The only times I've heard grandparent titles + names are when multiple grandparents ended up getting the same title. My ex had Papaw Bobby and Papaw Bill, I think it was, though his grandmothers were Mamaw and Nana. Dunno how that one worked out. Or names get added to titles when there's multiple of the same name, like my Daddy-Bob for my grandfather, and Uncle-Bob for uncle. I dunno if that's common, or just a random family nicknaming pattern. Hrm.

Yeah, Meemaw, I've heard that one, now that you mention it. Where do these short-versions come from? Heh.