ChanteyLass, what you say about "Mémé" is very interesting. In France few grandmothers want to be called "Mémé", they want to be called "Mamie" as grandpas want to be called "Papy" because the "ee" sound at the end sounds English = young. So "Mémé" are most often great-grandmothers and "Pépé" great-grandfathers. We're more likely to say "une vieille mémée" seldom "une vieille mamie" unless she's your own grandma in which case "mamie" sounds more endearing than "mémé".