Other grandparent names?

[Keira]

Hi,

Just wondering if your children have an unusual name they call their grandparents?

My mum has just turned 45 and feels that the name Grandma or Nanna makes her sound/feel/look old! She's a very "young" 45, and looks a lot younger, so people think we're sisters most of the time...

So we're looking for a name that our baby can call her that isn't a normal Grandma/Nanna name!

So far, i thought of Nah-nah (sounding like banana) but other than that, i'm stumped!

Any suggestions?

Thanks, Keira