diff --git a/core/meta/inc/TClass.h b/core/meta/inc/TClass.h
index fec709736ea2b..39ba43e9de3f4 100644
--- a/core/meta/inc/TClass.h
+++ b/core/meta/inc/TClass.h
@@ -335,7 +335,12 @@ friend class TStreamerInfo;
    static DeclIdMap_t *GetDeclIdMap();  //Map from DeclId_t to TClass pointer
    static std::atomic<Int_t>     fgClassCount;  //provides unique id for a each class
                                                 //stored in TObject::fUniqueID
-   static TDeclNameRegistry fNoInfoOrEmuOrFwdDeclNameRegistry; // Store decl names of the forwardd and no info instances
+   // Store decl names of the forward and no info instances. Returned by an
+   // accessor rather than being a plain static object so that it is
+   // constructed on first use and never destroyed: it must outlive every
+   // other static object, because ~TGenericClassInfo -> RemoveClass ->
+   // SetUnloaded touches it during __cxa_finalize at exit(). See issue #13200.
+   static TDeclNameRegistry &GetNoInfoOrEmuOrFwdDeclNameRegistry();
    static Bool_t HasNoInfoOrEmuOrFwdDeclaredDecl(const char*);
 
    // Internal status bits, set and reset only during initialization and thus under the protection of the global lock.
diff --git a/core/meta/src/TClass.cxx b/core/meta/src/TClass.cxx
index 37c2b3824ae2c..9488cf1f10b32 100644
--- a/core/meta/src/TClass.cxx
+++ b/core/meta/src/TClass.cxx
@@ -261,8 +261,18 @@ TClass::InsertTClassInRegistryRAII::~InsertTClassInRegistryRAII() {
       }
    }
 
-// Initialise the global member of TClass
-TClass::TDeclNameRegistry TClass::fNoInfoOrEmuOrFwdDeclNameRegistry;
+// Accessor for the registry of decl names of the forward and no-info
+// instances. The underlying object is intentionally leaked (function-local
+// static pointer, never deleted): it must outlive every other static object,
+// because the TGenericClassInfo destructors run at exit() during
+// __cxa_finalize and reach this registry through RemoveClass()/SetUnloaded().
+// Making it a plain static object triggered a use-after-destruction segfault
+// on platforms (e.g. FreeBSD/libc++) where it was torn down first. See #13200.
+TClass::TDeclNameRegistry &TClass::GetNoInfoOrEmuOrFwdDeclNameRegistry()
+{
+   static TDeclNameRegistry *reg = new TDeclNameRegistry(gDebug);
+   return *reg;
+}
 
 //Intent of why/how TClass::New() is called
 //[Not a static data member because MacOS does not support static thread local data member ... who knows why]
@@ -1375,7 +1385,7 @@ void TClass::Init(const char *name, Version_t cversion,
 
    TClass *oldcl = (TClass*)gROOT->GetListOfClasses()->FindObject(fName.Data());
 
-   InsertTClassInRegistryRAII insertRAII(fState,fName,fNoInfoOrEmuOrFwdDeclNameRegistry);
+   InsertTClassInRegistryRAII insertRAII(fState,fName,GetNoInfoOrEmuOrFwdDeclNameRegistry());
 
    if (oldcl && oldcl->TestBit(kLoading)) {
       // Do not recreate a class while it is already being created!
@@ -3458,7 +3468,7 @@ TClass *TClass::GetClass(ClassInfo_t *info, Bool_t load, Bool_t silent)
 ////////////////////////////////////////////////////////////////////////////////
 
 Bool_t TClass::HasNoInfoOrEmuOrFwdDeclaredDecl(const char* name){
-   return fNoInfoOrEmuOrFwdDeclNameRegistry.HasDeclName(name);
+   return GetNoInfoOrEmuOrFwdDeclNameRegistry().HasDeclName(name);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -4239,7 +4249,7 @@ void TClass::ResetClassInfo()
 {
    R__LOCKGUARD(gInterpreterMutex);
 
-   InsertTClassInRegistryRAII insertRAII(fState,fName,fNoInfoOrEmuOrFwdDeclNameRegistry);
+   InsertTClassInRegistryRAII insertRAII(fState,fName,GetNoInfoOrEmuOrFwdDeclNameRegistry());
 
    if (fClassInfo) {
       TClass::RemoveClassDeclId(gInterpreter->GetDeclId(fClassInfo));
@@ -6431,7 +6441,7 @@ void TClass::SetUnloaded()
             GetName(),(int)fState);
    }
 
-   InsertTClassInRegistryRAII insertRAII(fState, fName, fNoInfoOrEmuOrFwdDeclNameRegistry);
+   InsertTClassInRegistryRAII insertRAII(fState, fName, GetNoInfoOrEmuOrFwdDeclNameRegistry());
 
    // Make sure SetClassInfo, re-calculated the state.
    fState = kForwardDeclared;
diff --git a/etc/valgrind-root.supp b/etc/valgrind-root.supp
index 01ea89754559d..a68263e819ea4 100644
--- a/etc/valgrind-root.supp
+++ b/etc/valgrind-root.supp
@@ -153,6 +153,28 @@
    fun:_ZN6TClass4InitEPKcs*
 }
 
+# TClass::fNoInfoOrEmuOrFwdDeclNameRegistry is an intentionally immortal
+# singleton (see issue #13200): it is never destroyed so that it can be safely
+# touched by SetUnloaded() from the TGenericClassInfo destructors during
+# __cxa_finalize at exit(). Everything it owns therefore stays reachable until
+# process death. The two blocks below cover it independently of the caller
+# (TClass::Init, SetUnloaded, ResetClassInfo).
+{
+   TClass::TDeclNameRegistry immortal singleton (#13200)
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN6TClass35GetNoInfoOrEmuOrFwdDeclNameRegistryEv
+}
+
+{
+   TClass::TDeclNameRegistry::AddQualifiedName immortal set (#13200)
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN6TClass17TDeclNameRegistry16AddQualifiedNameEPKc
+}
+
 {
    TClass thread local storage
    Memcheck:Leak