bob, my father in law and I call each other Bob (after the character in Blackadder, don't ask why) so we're teaching my sister in law's little boy to call me Uncle Bob, so no, I don't have an Uncle Bob myself, but I'm hoping to be one soon!
bob was my grandfather but, alas, i never met him.
Ken was my only uncle but he died of asbestosis 26 years ago.
I am feeling a bit deprived. Any adoptive uncles out there ?