My mom kinda just brushed it off as "yeah that was where he lived when Grandma died but hes probably moved or changed his name like you had thought." I guess shes just not really intrested in finding him as she once was 15 years ago. My Grandma had put in her will to hire another PI to find him to give him his share of the estate and the PI found him but the check came back. My mom said thats how serious he was about not wanting to be a part of the family.