diff --git a/src/class_diagram/model/enum.cc b/src/class_diagram/model/enum.cc
index 2343559f..41bbdb77 100644
--- a/src/class_diagram/model/enum.cc
+++ b/src/class_diagram/model/enum.cc
@@ -41,9 +41,11 @@ std::string enum_::full_name(bool relative) const
 
     std::ostringstream ostr;
     if (relative)
-        ostr << namespace_{name()}.relative_to(using_namespace()).to_string();
+        ostr << namespace_{name_and_ns()}
+                    .relative_to(using_namespace())
+                    .to_string();
     else
-        ostr << name();
+        ostr << name_and_ns();
 
     return ostr.str();
 }
diff --git a/src/class_diagram/visitor/translation_unit_context.cc b/src/class_diagram/visitor/translation_unit_context.cc
index 3e200753..0031d010 100644
--- a/src/class_diagram/visitor/translation_unit_context.cc
+++ b/src/class_diagram/visitor/translation_unit_context.cc
@@ -209,4 +209,59 @@ translation_unit_context::using_namespace_directive(
     return using_ns_declarations_.at(ns.to_string());
 }
 
+type_safe::optional<common::model::namespace_>
+translation_unit_context::get_name_with_namespace(const std::string &name) const
+{
+    using common::model::namespace_;
+
+    std::set<namespace_> possible_matches;
+    possible_matches.emplace(name);
+
+    possible_matches.emplace(get_namespace() | namespace_{name});
+    auto parent = get_namespace().parent();
+    while (parent.has_value()) {
+        possible_matches.emplace(parent.value() | namespace_{name});
+        parent = parent.value().parent();
+    }
+
+    if (using_ns_declarations_.find(get_namespace().to_string()) !=
+        using_ns_declarations_.end()) {
+        for (const auto &ns :
+            using_ns_declarations_.at(get_namespace().to_string())) {
+            possible_matches.emplace(ns | namespace_{name});
+            auto parent = ns.parent();
+            while (parent.has_value()) {
+                possible_matches.emplace(parent.value() | namespace_{name});
+                parent = parent.value().parent();
+            }
+        }
+    }
+
+    // Search classes
+    for (const auto &c : diagram_.classes()) {
+        auto c_ns = namespace_{c->name_and_ns()};
+        for (const auto &possible_match : possible_matches) {
+            if (c_ns == possible_match) {
+                return possible_match;
+            }
+        }
+    }
+
+    // Search enums
+    for (const auto &e : diagram_.enums()) {
+        auto e_ns = namespace_{e->name_and_ns()};
+        for (const auto &possible_match : possible_matches) {
+            if (e_ns == possible_match) {
+                return possible_match;
+            }
+            // Try to also match possible references to enum values
+            else if (possible_match.starts_with(e_ns)) {
+                return possible_match;
+            }
+        }
+    }
+
+    return {};
+}
+
 }
diff --git a/src/class_diagram/visitor/translation_unit_context.h b/src/class_diagram/visitor/translation_unit_context.h
index 188eb1cf..714f7eae 100644
--- a/src/class_diagram/visitor/translation_unit_context.h
+++ b/src/class_diagram/visitor/translation_unit_context.h
@@ -83,6 +83,9 @@ public:
     const std::set<common::model::namespace_> &using_namespace_directive(
         const common::model::namespace_ &ns) const;
 
+    type_safe::optional<common::model::namespace_> get_name_with_namespace(
+        const std::string &name) const;
+
 private:
     // Current visitor namespace
     common::model::namespace_ ns_;
@@ -90,6 +93,8 @@ private:
     // A map of 'using namespace' declared within a given namespace scope
     // This is necessary to properly establish the namespace of a given entity
     // for instance in unexposed template parameters
+    //  - key - namespace
+    //  - value - set of namespaces 'imported' within this namespace scope
     std::map<std::string, std::set<common::model::namespace_>>
         using_ns_declarations_;
 
diff --git a/src/class_diagram/visitor/translation_unit_visitor.cc b/src/class_diagram/visitor/translation_unit_visitor.cc
index 10394118..03debefb 100644
--- a/src/class_diagram/visitor/translation_unit_visitor.cc
+++ b/src/class_diagram/visitor/translation_unit_visitor.cc
@@ -179,14 +179,15 @@ void translation_unit_visitor::operator()(const cppast::cpp_entity &file)
                 process_type_alias_template(at);
             }
             else if (e.kind() == cppast::cpp_entity_kind::using_directive_t) {
+                using common::model::namespace_;
 
                 const auto &using_directive =
                     static_cast<const cppast::cpp_using_directive &>(e);
 
                 const auto ns_ref = using_directive.target();
+                const auto &ns = ns_ref.get(ctx.entity_index()).at(0).get();
                 if (ns_ref.get(ctx.entity_index()).size() > 0) {
-                    auto full_ns = cx::util::full_name(ctx.get_namespace(),
-                        ns_ref.get(ctx.entity_index()).at(0).get());
+                    auto full_ns = namespace_{cx::util::ns(ns)} | ns.name();
 
                     ctx.add_using_namespace_directive(full_ns);
                 }
@@ -503,10 +504,16 @@ void translation_unit_visitor::
 {
     auto ua = tspec.value().unexposed_arguments().as_string();
 
-    auto template_params = cx::util::parse_unexposed_template_params(ua);
+    auto template_params = cx::util::parse_unexposed_template_params(
+        ua, [this](const std::string &t) {
+            auto full_type = ctx.get_name_with_namespace(t);
+            if (full_type.has_value())
+                return full_type.value().to_string();
+            return t;
+        });
 
     found_relationships_t relationships;
-    for (const auto &param : template_params) {
+    for (auto &param : template_params) {
         find_relationships_in_unexposed_template_params(param, relationships);
         c.add_template(param);
     }
@@ -1414,31 +1421,17 @@ bool translation_unit_visitor::find_relationships_in_unexposed_template_params(
     LOG_DBG("Finding relationships in user defined type: {}",
         ct.to_string(ctx.config().using_namespace()));
 
-    if (!util::contains(ct.type(), "::")) {
-        // The type name has no namespace - assume it is in the current
-        // namespace
-        // TODO: try also all namespaces declared through 'using namespace'
-        // directive in the current scope
-        if (ctx.config().should_include(ctx.get_namespace(), ct.type())) {
-            relationships.emplace_back(ct.type(), relationship_t::kDependency);
-            found = true;
-        }
-    }
-    else {
-        // Calculate the complete namespace of the type
-        auto type_ns = common::model::namespace_{ct.type()};
-        auto type_name = type_ns.name();
-        type_ns.pop_back();
+    auto type_with_namespace = ctx.get_name_with_namespace(ct.type());
 
-        auto current_ns = ctx.get_namespace();
-        if (current_ns.ends_with(type_ns)) {
-            if (ctx.config().should_include(current_ns, type_name)) {
-                auto full_name = (current_ns | type_name).to_string();
-                relationships.emplace_back(
-                    full_name, relationship_t::kDependency);
-                found = true;
-            }
-        }
+    if (!type_with_namespace.has_value()) {
+        // Couldn't find declaration of this type
+        type_with_namespace = common::model::namespace_{ct.type()};
+    }
+
+    if (ctx.config().should_include(type_with_namespace.value())) {
+        relationships.emplace_back(type_with_namespace.value().to_string(),
+            relationship_t::kDependency);
+        found = true;
     }
 
     for (const auto &nested_template_params : ct.template_params_) {
diff --git a/src/common/model/namespace.cc b/src/common/model/namespace.cc
index 37f42a5f..ed25e50a 100644
--- a/src/common/model/namespace.cc
+++ b/src/common/model/namespace.cc
@@ -99,6 +99,17 @@ void namespace_::append(const namespace_ &ns)
 
 void namespace_::pop_back() { namespace_path_.pop_back(); }
 
+type_safe::optional<namespace_> namespace_::parent() const
+{
+    if (size() <= 1) {
+        return {};
+    }
+
+    namespace_ res{*this};
+    res.pop_back();
+    return {std::move(res)};
+}
+
 namespace_ namespace_::operator|(const namespace_ &right) const
 {
     namespace_ res{*this};
diff --git a/src/common/model/namespace.h b/src/common/model/namespace.h
index e8c19c82..03d42bc9 100644
--- a/src/common/model/namespace.h
+++ b/src/common/model/namespace.h
@@ -18,6 +18,7 @@
 #pragma once
 
 #include <string>
+#include <type_safe/optional.hpp>
 #include <vector>
 
 namespace clanguml::common::model {
@@ -68,6 +69,8 @@ public:
 
     void pop_back();
 
+    type_safe::optional<namespace_> parent() const;
+
     bool starts_with(const namespace_ &right) const;
     bool ends_with(const namespace_ &right) const;
     namespace_ common_path(const namespace_ &right) const;
diff --git a/src/cx/util.cc b/src/cx/util.cc
index d462dc11..157eee80 100644
--- a/src/cx/util.cc
+++ b/src/cx/util.cc
@@ -297,7 +297,8 @@ const cppast::cpp_type &unreferenced(const cppast::cpp_type &t)
 }
 
 std::vector<class_diagram::model::class_template>
-parse_unexposed_template_params(const std::string &params)
+parse_unexposed_template_params(const std::string &params,
+    std::function<std::string(const std::string &)> ns_resolve)
 {
     using class_diagram::model::class_template;
 
@@ -331,7 +332,8 @@ parse_unexposed_template_params(const std::string &params)
             }
             std::string nested_params_str(
                 bracket_match_begin, bracket_match_end);
-            nested_params = parse_unexposed_template_params(nested_params_str);
+            nested_params =
+                parse_unexposed_template_params(nested_params_str, ns_resolve);
             if (nested_params.empty())
                 nested_params.emplace_back(class_template{nested_params_str});
             it = bracket_match_end - 1;
@@ -347,7 +349,7 @@ parse_unexposed_template_params(const std::string &params)
         }
         if (complete_class_template) {
             class_template t;
-            t.set_type(clanguml::util::trim(type));
+            t.set_type(ns_resolve(clanguml::util::trim(type)));
             type = "";
             t.template_params_ = std::move(nested_params);
 
@@ -359,7 +361,7 @@ parse_unexposed_template_params(const std::string &params)
 
     if (!type.empty()) {
         class_template t;
-        t.set_type(clanguml::util::trim(type));
+        t.set_type(ns_resolve(clanguml::util::trim(type)));
         type = "";
         t.template_params_ = std::move(nested_params);
 
diff --git a/src/cx/util.h b/src/cx/util.h
index f32122d6..65118171 100644
--- a/src/cx/util.h
+++ b/src/cx/util.h
@@ -69,7 +69,8 @@ std::pair<common::model::namespace_, std::string> split_ns(
 bool is_inside_class(const cppast::cpp_entity &e);
 
 std::vector<class_diagram::model::class_template>
-parse_unexposed_template_params(const std::string &params);
+parse_unexposed_template_params(const std::string &params,
+    std::function<std::string(const std::string &)> ns_resolve);
 
 } // namespace util
 } // namespace cx
diff --git a/tests/t00038/.clang-uml b/tests/t00038/.clang-uml
index 29318d35..a0f321ac 100644
--- a/tests/t00038/.clang-uml
+++ b/tests/t00038/.clang-uml
@@ -3,11 +3,12 @@ output_directory: puml
 diagrams:
   t00038_class:
     type: class
-    generate_packages: true
+    generate_packages: false
     glob:
       - ../../tests/t00038/t00038.cc
     using_namespace:
       - clanguml::t00038
     include:
       namespaces:
-        - clanguml::t00038
\ No newline at end of file
+        - clanguml::t00038
+        - thirdparty::ns1
\ No newline at end of file
diff --git a/tests/t00038/t00038.cc b/tests/t00038/t00038.cc
index 63dec538..e33b091e 100644
--- a/tests/t00038/t00038.cc
+++ b/tests/t00038/t00038.cc
@@ -3,6 +3,19 @@
 #include <type_traits>
 #include <vector>
 
+namespace thirdparty {
+namespace ns1 {
+enum class color_t { red, green, blue };
+
+struct E {
+};
+} // namespace ns1
+namespace ns2 {
+struct F {
+};
+} // namespace ns2
+} // namespace thirdparty
+
 namespace clanguml {
 namespace t00038 {
 
@@ -21,6 +34,11 @@ struct key_t {
 
 template <typename T> struct map;
 
+using namespace thirdparty::ns1;
+
+template <> struct map<std::integral_constant<color_t, color_t::red>> : E {
+};
+
 template <>
 struct map<std::integral_constant<clanguml::t00038::property_t,
     clanguml::t00038::property_t::property_a>> : A {
diff --git a/tests/t00038/test_case.h b/tests/t00038/test_case.h
index 102f4982..512f1a39 100644
--- a/tests/t00038/test_case.h
+++ b/tests/t00038/test_case.h
@@ -23,7 +23,7 @@ TEST_CASE("t00038", "[test-case][class]")
     auto diagram = config.diagrams["t00038_class"];
 
     REQUIRE(diagram->name == "t00038_class");
-    REQUIRE(diagram->generate_packages() == true);
+    REQUIRE(diagram->generate_packages() == false);
 
     auto model = generate_class_diagram(db, diagram);
 
@@ -38,6 +38,7 @@ TEST_CASE("t00038", "[test-case][class]")
     REQUIRE_THAT(puml, IsClass(_A("A")));
     REQUIRE_THAT(puml, IsClass(_A("B")));
     REQUIRE_THAT(puml, IsClass(_A("C")));
+    REQUIRE_THAT(puml, IsClass(_A("thirdparty::ns1::E")));
     REQUIRE_THAT(puml, IsClass(_A("key_t")));
     REQUIRE_THAT(puml, IsClassTemplate("map", "T"));
     REQUIRE_THAT(puml,
@@ -45,8 +46,7 @@ TEST_CASE("t00038", "[test-case][class]")
             "std::integral_constant<property_t,property_t::property_a>"));
     REQUIRE_THAT(puml,
         IsClassTemplate("map",
-            "std::vector<std::integral_constant<t00038::property_t,t00038::"
-            "property_t::"
+            "std::vector<std::integral_constant<property_t,property_t::"
             "property_b>>"));
     REQUIRE_THAT(puml,
         IsClassTemplate("map",
@@ -70,9 +70,8 @@ TEST_CASE("t00038", "[test-case][class]")
 
     REQUIRE_THAT(puml,
         IsDependency(_A("map<"
-                        "std::vector<std::integral_constant<t00038::property_t,"
-                        "t00038::property_t::"
-                        "property_b>>>"),
+                        "std::vector<std::integral_constant<property_t,"
+                        "property_t::property_b>>>"),
             _A("property_t")));
 
     REQUIRE_THAT(puml,
@@ -85,6 +84,11 @@ TEST_CASE("t00038", "[test-case][class]")
                         "property_t,property_t::property_c>>>>"),
             _A("key_t")));
 
+    REQUIRE_THAT(puml,
+        IsDependency(_A("map<std::integral_constant<thirdparty::ns1::color_t,"
+                        "thirdparty::ns1::color_t::red>>"),
+            _A("thirdparty::ns1::color_t")));
+
     save_puml(
         "./" + config.output_directory() + "/" + diagram->name + ".puml", puml);
 }
diff --git a/tests/test_cases.h b/tests/test_cases.h
index b20dbd8b..7d6e20fd 100644
--- a/tests/test_cases.h
+++ b/tests/test_cases.h
@@ -31,6 +31,7 @@
 #include "util/util.h"
 
 #define CATCH_CONFIG_RUNNER
+#define CATCH_CONFIG_CONSOLE_WIDTH 512
 
 #include "catch.h"
 
diff --git a/tests/test_util.cc b/tests/test_util.cc
index 1df6d573..6e9be6fd 100644
--- a/tests/test_util.cc
+++ b/tests/test_util.cc
@@ -75,7 +75,8 @@ TEST_CASE("Test parse_unexposed_template_params", "[unit-test]")
 
     const std::string int_template_str{"ns1::ns2::class1<int>"};
 
-    auto int_template = parse_unexposed_template_params(int_template_str);
+    auto int_template = parse_unexposed_template_params(
+        int_template_str, [](const auto &n) { return n; });
 
     CHECK(int_template.size() == 1);
     CHECK(int_template[0].template_params_.size() == 1);
@@ -84,8 +85,8 @@ TEST_CASE("Test parse_unexposed_template_params", "[unit-test]")
 
     const std::string int_int_template_str{"ns1::ns2::class1<int, int>"};
 
-    auto int_int_template =
-        parse_unexposed_template_params(int_int_template_str);
+    auto int_int_template = parse_unexposed_template_params(
+        int_int_template_str, [](const auto &n) { return n; });
 
     CHECK(int_int_template.size() == 1);
     CHECK(int_int_template[0].template_params_.size() == 2);
@@ -96,7 +97,8 @@ TEST_CASE("Test parse_unexposed_template_params", "[unit-test]")
     const std::string nested_template_str{
         "class1<int, ns1::class2<int, std::vector<std::string>>>"};
 
-    auto nested_template = parse_unexposed_template_params(nested_template_str);
+    auto nested_template = parse_unexposed_template_params(
+        nested_template_str, [](const auto &n) { return n; });
 
     CHECK(nested_template.size() == 1);
     CHECK(nested_template[0].template_params_.size() == 2);