...he always mixed up the names of his kids/grandkids (and had been known to go through at least five or six names before getting to the right one)

*laugh* My great-grandmother was the same way. She'd look at you, and on a particularly impressive day would start with her *older* sister and work her way through every female relative in the family tree. murphymom would always patiently let her run down before quietly noting, "I'm Donna." (She wore earrings with her name on them for a while, good-naturedly ribbing Nana about it; didn't help.)