Two sets of GPs: Grandpa and Grandma (DH's parents), and Granny and Granda (my parents). We're spending Xmas at DB's and my parents are here.
My dad always signs cards to DD(3) as "Grandpa", and often refers to himself as that to her. I've explained a few times that that's what her grandfather in the US is called and we don't want her to be confused. But she's even corrected my dad when he's called himself Grandpa!
Today I've heard him catching himself as he said "Granda", then changed it to "Grandpa". So it doesn't just feel like a mistake, but a deliberate attempt to wind me up (which he has form for).
I know this is such a trivial thing, but it's really getting on my tits now. AIBU to expect him to respect the different names we have, or should I just ignore it and roll my eyes as usual ?