Mimmi = Bestemor = Mormor = Grandmother

When I grew up we used the word Mormor (Mother of Mother) instead of Bestemor (Best Mother) for my Swedish grandmother and Farmor (Mother of Father) for my Norwegian paternal grandmother.

Lately I have heard about Mimmi and thought by mistake that this was a given name for a woman. After all, I know another Mimmi in another country.

But that was a mistake.
In this case, Mimmi is an additional word for Mormor and Bestemor and Grandmother.