Finding My Cousin Israel Fiselsons #names


I have a letter postmarked 1973 from Israel Fiselsons to my uncle, Reubin Weitzman. The letter contains his then mailing address. Israel was living in his mother's apartment with his wife and ten year old daughter. I have the full mailing address but am looking the for name of the owner/tenant of the apartment. I believe she is a sister to my maternal grandmother, Slova Weitzman (born Schiren).

Any suggestions? I have tried everything without success.

Thanks in advance,

Allen Weitzman