diff --git a/src/NodaValidationHelper.php b/src/NodaValidationHelper.php
index 75965f3..c9a345b 100644
--- a/src/NodaValidationHelper.php
+++ b/src/NodaValidationHelper.php
@@ -161,14 +161,19 @@ final class NodaValidationHelper {
             throw new MDBlacklistedInputException("Term is blacklisted");
         }
 
+        // Check rewrites
+
         if ($existingPersinstId = NodaIDGetter::getPersinstIDByNamesAndRewrites($mysqli_noda, $lang, $persinst_name_en, $persinst_geburtsjahr, $persinst_sterbejahr, $context_identifier, $institution_id)) {
             return $existingPersinstId;
         }
 
-        if ($existingPersinstId = NodaIDGetter::getPersinstIDByNamesAndRewrites($mysqli_noda, $lang, $persinst_name, $persinst_geburtsjahr, $persinst_sterbejahr, $context_identifier, $institution_id)) {
-            return $existingPersinstId;
+        if ($persinst_name_en !== $persinst_name) {
+            if ($existingPersinstId = NodaIDGetter::getPersinstIDByNamesAndRewrites($mysqli_noda, $lang, $persinst_name, $persinst_geburtsjahr, $persinst_sterbejahr, $context_identifier, $institution_id)) {
+                return $existingPersinstId;
+            }
         }
 
+        // Return 0, no ID found
         return 0;
 
     }