My dear nanna (maternal gmother) was Florence (known as Flo - and she HATED her first name) and grandma (paternal) Olive.
If you like "older" names, here's a few in my and DH's families: Ida, Katherine, Mary-Ellen, Eileen, Gwen, Leila, Maisie (Margaret), Evelyn, Vera, Molly, Violet (Vi) and Elizabeth.