"nana" (meaning grand-mother) is "mamie", more rarely "mémé". Many families have their own naming. It could be "mamou" or any other name.
In Maori, you would say "Kei hea a Nana?" to ask where someone named Nana is.
Farewell = nana
no belt
Goodbye = nana
Hablé con nana sobre eso. (I talked to nana about that)
Nana = Oma Nana = Omi
Nana
Mémére.
Nana
omi
Aiti
If you mean by 'nana' a nursemaid or grandmother, it could be buime or seanmháthair/máthair mhór/mamó. If it is a personal name it would be Nana.