diff --git a/root/meta/naming/CMakeLists.txt b/root/meta/naming/CMakeLists.txt
index 88d8058a7a..b1045cd9fc 100644
--- a/root/meta/naming/CMakeLists.txt
+++ b/root/meta/naming/CMakeLists.txt
@@ -4,3 +4,5 @@ ROOTTEST_ADD_AUTOMACROS(DEPENDS namingMatches.cxx
 ROOTTEST_ADD_TEST(execCheckNaming
                   MACRO execCheckNaming.C
                   OUTREF execCheckNaming${ref_suffix})
+
+ROOTTEST_ADD_TESTDIRS()
diff --git a/root/meta/naming/issue-18363/CMakeLists.txt b/root/meta/naming/issue-18363/CMakeLists.txt
new file mode 100644
index 0000000000..55f3a804cd
--- /dev/null
+++ b/root/meta/naming/issue-18363/CMakeLists.txt
@@ -0,0 +1,6 @@
+ROOTTEST_GENERATE_REFLEX_DICTIONARY(size_tTemplateDict Objects.h SELECTION selection.xml FIXTURES_SETUP size_tTemplate_lib)
+
+ROOTTEST_ADD_TEST(size_tTemplateName
+                  MACRO size_tTemplateNameTest.C
+                  OUTREF size_tTemplateNameTest.ref
+		  FIXTURES_REQUIRED size_tTemplate_lib)
diff --git a/root/meta/naming/issue-18363/Objects.h b/root/meta/naming/issue-18363/Objects.h
new file mode 100644
index 0000000000..3099127c0d
--- /dev/null
+++ b/root/meta/naming/issue-18363/Objects.h
@@ -0,0 +1,12 @@
+#ifndef Objects_18363_hxx
+#define Objects_18363_hxx
+
+namespace reco { 
+template <size_t I, bool B> struct PFRecHitSoALayout {
+   template <size_t II, bool B1, bool B2, bool B3> struct ViewTemplateFreeParams {};
+   using View = ViewTemplateFreeParams<I, B, true, true>;
+};
+using PFRecHitSoA = PFRecHitSoALayout<128,false>; // The result is the same with 128UL or 128ul
+}
+
+#endif
diff --git a/root/meta/naming/issue-18363/selection.xml b/root/meta/naming/issue-18363/selection.xml
new file mode 100644
index 0000000000..341ead3d72
--- /dev/null
+++ b/root/meta/naming/issue-18363/selection.xml
@@ -0,0 +1,4 @@
+<lcgdict>
+ <class name="reco::PFRecHitSoA"/>
+ <class name="reco::PFRecHitSoA::View"/>
+</lcgdict>
diff --git a/root/meta/naming/issue-18363/size_tTemplateNameTest.C b/root/meta/naming/issue-18363/size_tTemplateNameTest.C
new file mode 100644
index 0000000000..b3e51e3ea2
--- /dev/null
+++ b/root/meta/naming/issue-18363/size_tTemplateNameTest.C
@@ -0,0 +1,26 @@
+{
+   TFile pcmfile("size_tTemplateDict_rdict.pcm");
+   if (pcmfile.IsZombie()) {
+      std::cerr << "Error: Failed to open root pcm file: " << pcmfile.GetName() << '\n';
+      return 1;
+   }
+   TObjArray *protoArray = pcmfile.Get<TObjArray>("__ProtoClasses");
+   if (!protoArray) {
+      std::cerr << "Error: Failed to retrieve __ProtoClasses\n";
+      return 2;
+   }
+   protoArray->Print();
+
+   const char *classname = "reco::PFRecHitSoALayout<128,false>::ViewTemplateFreeParams<128,false,true,true>";
+   auto cl = TClass::GetClass(classname);
+   if (!cl) {
+     std::cerr << "Error: Could not get the TClass for " << classname << "\n";
+     return 3;
+   }
+   if (!cl->IsLoaded()) {
+     std::cerr << "Error: The TClass is not loaded for " << classname << "\n";
+     return 4;
+   }
+   
+   return 0;
+}
diff --git a/root/meta/naming/issue-18363/size_tTemplateNameTest.ref b/root/meta/naming/issue-18363/size_tTemplateNameTest.ref
new file mode 100644
index 0000000000..96dfe47584
--- /dev/null
+++ b/root/meta/naming/issue-18363/size_tTemplateNameTest.ref
@@ -0,0 +1,5 @@
+
+Processing /Users/pcanal/root_working/roottest/root/meta/naming/issue-18363/size_tTemplateNameTest.C...
+Collection name='TObjArray', class='TObjArray', size=16
+ OBJ: TProtoClass	reco::PFRecHitSoALayout<128,false>	
+ OBJ: TProtoClass	reco::PFRecHitSoALayout<128,false>::ViewTemplateFreeParams<128,false,true,true>