iām not sure if a thread like this exists yet but i thought it would be fun to share your nicknames for your grandparents and maybe, if you had any, what nickname you would want your grandchildren to call you!
for example:
my (paternal) grandparents are my grammy and pop-pop, and i think i would like to be marmee or papa with my own grandchildren <3 my partner would be gaia!
Typically, itās just been [name_f]Nanny[/name_f] and Grandad, however, my great grandad used to be Grandad Mate (as he called everyone āMateā)
my paternal grandma is famo!
well, I never met any of my grandfathers, but my paternal grandmother is just Grandma and my maternal grandmother is [name_u]Nana[/name_u]. I did get to meet my great-grandfather and he was [name_f]Papa[/name_f].
when I have kids, my kids are going to have two sets of grandparents on my side, my mom and dad, and then my adopted parents (itās complicated) so my mom and dad are gong to be Platypus and Grandad. it started as a joke between me and my mom with her calling me [name_m]Little[/name_m] Puggle which is a baby Platypus, so I decided that sheās gonna be Platypus to my kids (not gonna lie, I hope it gets shortened to Platty because that would be adorable). and then my adopted parents are just gonna be Grandma and Grandpa.
when Iām a grandmother someday, I think I want to be [name_u]Puma[/name_u], becuase itās russian for cougar and I think it would be hilarious.
theyāve all passed butā¦
my maternal grandparents: grandma & grandad
my paternal grandparents: granny & grandad
Iād probably be happiest with granny or grandma 
grandparent nicknames arenāt really common where iām from, but i do call one of my grandmothers mama, because iād stay over at her house so often when i was really young that i thought she was my second mum 
i never met either of my grandfathers, but i have someone whoās like a grandfather to me (my grandmotherās brother) who i call dodo (a nickname for his name, theodoros, that only i use)
iād probably either be just-grandma (in the language of the country i live in at the time), or āyiayiaā with my own grandkids!
iām english and almost everyone here calls their grandmother nan, nana or nanny! for me, my maternal grandmother is nanny and my paternal grandmother nana. as for grandfathers, both of them are grandad for me!
in america, i was quite shocked that grandparents had so many names!! like meemaw, peepaw (my friendās grandparents), mimi, gigi, grandmommy & grandpoppy are some of the ones iāve heard!
i think i would like my grandmother name to be nanny or nana 
my grandma is [name_u]Nana[/name_u] š«¶š¼ we sometimes affectionally nickname her [name_f]Daisy[/name_f], so thatās another of hers
[name_f]My[/name_f] grandparents all got divorced and remarried, so I have 8
Grandma & Grandpa
[name_u]Nana[/name_u] & Papaw (NAN-nuh, PAP-paw)
Memere & Pawpaw
[name_f]Honey[/name_f] & Pappy (but mostly I just called him by his name, Norman)
[name_f]My[/name_f] nephew calls my parents Yaya & Grumpy, which fit well actually. [name_f]My[/name_f] two great grandmothers who I knew were Mawmaw [name_f]Winnie[/name_f] (diminutive of her last name) and Mawmaw [name_u]June[/name_u].
[name_f]My[/name_f] grandparents were grandma and grandad (or āgangangā when I was very small!) one one side, and nana on the other. I know for a fact my mum will not want to be nana like her mother, I think she might end up as [name_f]Bee[/name_f] or [name_f]Bibi[/name_f] because itās her initial and she loves bees 
Personally, Iād be fine with traditional old grandma if the time comes!
my paternal grandparents are Babci and Gramps. my Babciās family is polish and Babci is a polish word for grandma
my maternal grandparents are [name_u]Nana[/name_u] and Bāpa. when my sister was a baby, she couldnāt say āgrandpaā so she called him Bāpa instead and it stuck. he especially loves it because his own father was Gāpa to my mom and aunt 
On my paternal side - Grandma & Grandpa
On my maternal side - Yaya/Yayi (prn JAH-jah/JAH-jee) & Dad (I was the first grandkid, I saw my mom calling him dad and copied her, and then my siblings and cousin copied me)
For me personally I think Iād want to be Aracoel (TaĆno word for grandma), Grandmama or [name_f]Ela[/name_f] (short for Abuela)
[name_f]My[/name_f] grandparents are grandma, papa, nonna, and then an unusual nickname for my grandfather that I wonāt say because I think they use it a lot online!
[name_f]My[/name_f] mother and I both want to be called nonna by any future grandchildren.
Iāve got:
[name_u]Nana[/name_u] and Grandpa [name_m]Mike[/name_m]
Nonee and [name_f]Papa[/name_f]
Grandpa
Iād like to be anything, really. Nonee or Grammy I can especially imagine!
I call my mom Marmee, so I hope my kids might call her that, too, one dayā¦ 
[name_f]My[/name_f] grandparents:
Grammy & Grampy
Grandma & Grandpa
[name_f]My[/name_f] great-grandparents (that I ever knew):
[name_m]Gram[/name_m]
[name_u]Nana[/name_u] & Bampa
[name_f]My[/name_f] parents to my niblings + soon-to-be child:
Grammy & Poobah
What SOās mom wants to be called:
Meemaw (this took us by surprise as itās really not usually a thing where we live)
What Iād like to be called:
hmmā¦ possibly Grandy. SO would like to be Bampa
my grandparents are grandma + papa and granny + grandpa! my great grandparents that i met were great grandma, and bampop + werwey! 
maternal grandma - gammie
paternal grandma - nana
paternal grandpa - jimpa
[name_f]My[/name_f] maternal grandparents were Grandma and Grandpa. [name_f]My[/name_f] paternal grandparents were [name_u]Nana[/name_u] and Grandpa [name_u]Jack[/name_u] or GJ.
[name_f]My[/name_f] grandparents:
Grandma & Grandpa
Gramma & Grandad
For myself, hmmā¦ Iām not sure about gender neutral grandparent nicknames! I feel like [name_f]Zuzu[/name_f] would be fun 
[name_f]My[/name_f] grandma is [name_f]Amma[/name_f]! Iām not sure how it started; it was passed down by my older cousins, but it fits her perfectly and i love it!
I would be so pleased to be [name_f]Amma[/name_f] as well someday