How the heck do you turn that off? I have in my address book my grandma listed as "Grandma", and when I get emails from her it changes to Grandma Lastname. This in turn syncs with my iPhone and screws up my contact list. Same applies for Dad, Mom, etc. Ok, it seems that when I reply to one of her emails it tacks her last name on inside address book. Same would be for dad, mom etc. I thought it when I received them but I just tested with one I sent, and bam! her last name popped up after I shot the email off.