In Hebrew, adding the letters ZL to the name indicates that he is deceased (similar to the English acronym RIP). I made two searches, and got interesting results:
1. Living profiles with Z"L in the name: 337
2. Living profiles with ז"ל in the name: 3103
The result is not fully accurate, because having a double quote in the search string is not handled as-is, but it gives you the general idea.
