your grandma name - how did you choose it?

I have a while before I choose for myself, but I have/had:
Grandma E...firstname (Gramma, Gram, nice grandma)
Grandma M... Firstname (& Grandpa/Gramps) (Gramma, mean grandma)
Mama (& papa)(great grandmother who didn't want to be called grandma when she was younger, so her grandchildren called her mama and it stuck through the great-greats)
Nana & papa (another set of great grandparents)
I think my other greats went by nonna and papa (they died when I was young and I have vague memories of them)

Nice grandma and mean grandma were named by my college roommates because they would call me at school. Nice grandma "knew" my roommates, asked about them, how classes were going, etc before even asking if I was home. Mean grandma would say "Where's Maria" if I wasn't the one to answer. Funny thing is they never specified beyond nice and mean- I knew

DH is from the south and had grandma & grandpa lastname and mommom and poppop. Mommom became great mommom to my kids. Grandma and grandpa were called grandma and grandpa but referred to as greats.

My parents are grandma and grandpa to my kids, but my dad is poppop, papa and gramps to my neices and nephews. Mom is grandma to all.

My mum was always Grandma and DH's mum was always Nanna. 

I said I liked Grandma better than Nanna and DH liked Grandpa but when our eldest started talking he pronounced Grandma as Gram-Ma and now our three grandies call me Gramma and DH is called Poppa. 

Son-in-law's parents are called Nanna and Grandad. 

The little ones decided on what they called us ❤️

Mine is "Grammy".  I kept playing with names and couldn't find one that felt right when I said it. Then my DH made a joke that his should be "Grumpy" (which stuck, because... well, he is, lol) and that helped because I wanted them to make sense together. So we're "Grammy" and "Grumpy". 

Jen

Honestly, and this is my thoughts, I feel like insisting that a grandchild call you a certain name is weird. I grew up calling my Grandparents by Grandpa/ma Lastname. No one told me to call them that, that's just what I ended up calling them. 

For my son, I asked my mom (bless her soul) if she wanted to be called a particular name just to cover in case she was particular like some people. She didn't care what she was called and would be happy with whatever my son said. We always said this was grandma and my son eventually called her NaNa, so that stuck. Ironically, my son called my DHs mom Grammie without us prompting. I feel like allowing the child to pick a name for their grandparents is more special and personally. 

I’m Nana as it started with my mother. She said she was too young to be called grandma...was 58. So, Nana followed on to me and my brother’s wife. My dad was Papa, as is my husband and brother.

Tūtū is the most commonly used Hawaiian word for "Grandma", so that is what I plan on using. If my future grandchildren make up their own term, I would go with that.

No kids here so I never will be a grandma and neither will my mother - which upsets me more.

I had a Grandma/Grandpa and a Granma/Grandad, chosen by them. As children, my brother and I differentiated between them by calling them Granma-at-Hook (where she lived) and Grandma-with-the-bike (she rode a motorcycle until she was 76!)

I just waited until my grandson started talking and he called us Mawmaw and Pawpaw. Great Grandma was Gigi.