My son already renamed the cat, now he's renamed his paternal grandfather. We've been using the titles “Gramps” and “Nanna” that my folks chose for themselves and Nate went along, but while driving from the airport to their house he decided that “Gramps” is better called “Nups”. He has no problem saying “Gramps” or making any of the sounds so the reason is all his own. He won't explain and he pays no attention when I correct him. Dad thinks it's funny so “Nups” it is.