"Uncle Connie." Well, I'm neither an uncle nor do I permit friends to address me as 'Connie' on penalty of my taking America's idiotically loose firearms laws to heart....
But many years ago there was a restaurant I frequented at times, named "Uncle Susie's." They were cheap, open round the clock, and served as a good-enough spot for a late supper at 2 a.m., followed by breakfast at 6 a.m., in the days when I worked the so-called graveyard shift. And somewhere along the line a conversation arose about the disjoint sexuality of the restaurant's name, and in the same discussion I chimed in with not liking it when people nicknamed me 'Connie,' and it was suggested that 'Uncle Connie' might just solve any confusion, and I adopted it more for the fun of the silliness than for any real interest in having it.
Of course, considering that I still have a couple of the friends who were in on the genesis, it follows that I also still have the silly nickname....