diff --git a/PyPDF2/generic/_base.py b/PyPDF2/generic/_base.py
index b968ef2bb..0da89bc8c 100644
--- a/PyPDF2/generic/_base.py
+++ b/PyPDF2/generic/_base.py
@@ -422,10 +422,10 @@ def writeToStream(
 
     @staticmethod
     def unnumber(sin: str) -> str:
-        i = sin.find("#")
+        i = sin.find("#", 0)
         while i >= 0:
             sin = sin[:i] + chr(int(sin[i + 1 : i + 3], 16)) + sin[i + 3 :]
-            i = sin.find("#")
+            i = sin.find("#", i + 1)
         return sin
 
     @staticmethod
diff --git a/tests/test_generic.py b/tests/test_generic.py
index d0798c5f6..deff2ddab 100644
--- a/tests/test_generic.py
+++ b/tests/test_generic.py
@@ -186,6 +186,12 @@ def test_NameObject():
         == "/paired()parentheses"
     )
     assert NameObject.read_from_stream(BytesIO(b"/A#42"), None) == "/AB"
+    assert (
+        NameObject.read_from_stream(
+            BytesIO(b"/#f1j#d4#aa#0c#ce#87#b4#b3#b0#23J#86#fe#2a#b2jYJ#94"), None
+        )
+        == "/ñjÔª\x0cÎ\x87´³°#J\x86þ*²jYJ\x94"
+    )
 
 
 def test_destination_fit_r():