What to call grandmothers?

[Orlea]

What do you (or rather your children) call your children's grandmothers? Both DM and MIL are Scottish.

DM's mum was Mama (her father was Papa) and Dad's mum was Granny (I never knew his father). DH called all of his grandparents 'Gran/Granpa+Surname', as in Gran Smith vs Gran Jones, which I find a bit weird for some reason!

I quite like the idea of continuing the 'Mama' tradition, but DM is already 'Granny' to other grandchildren, and I don't think MIL will like it (and DM might not like that being used). I don't really mind that much, and we will ask them their preference when the time comes, but I'm just curious as to what other people like/dislike and what combinations you have for either side...

MIL is Grandma, DM is Mimi and DF's partner is Nonna. DM chose hers, the other two were already in play because of older cousins.

My grandmothers were Nana and Grandma, DH's were Granny X and Granny Y

My grandparents were Nanny and Bampy (1st grand child's attempt at Grandpa) and Grandma and Grandad. My great grandmothers were Grandma Marshall (her surname) and Nanny-Nan.

My children have Granny and Papa (we wanted to keep Bampy going but 1st grand child decided it was papa); and Nona (Italian) and had Nando (His name).

They also have Nanny Joy and had Papi who are great aunt and uncle who live nearby.

grandma then name.
gran, granny,,grandmother
Nan, nanna, nanny,

My nan was Omi (which is German for granny), grandad was gramps! Or grumpy gramps

My parents are Grandma and Grandpa and PILs are Nanny and Grandad. Their choice, but I'm glad they chose different names. I expect Nanny will become Nan when DD is older.

DD(3) is going through a phase (which we are trying really hard to stop) of calling them black manma and brown manma because of the colour of their hair...
It used to be just manma for MIL and manma papa for my parents (no FIL) which sounds much better!

We have: Granny and Grampy (first grandchild, so they chose - same names as their own parents) and Nanny and Grandad (12th grandchild so already named). Surprised not to see anyone else called Grampy posted here, it is quite common where I live in the South West.

We also let them choose.
We have Nanny & Grandad,
Nan & Grandpa,
Nana & Grandad.