She feels very strongly and defensive about it being called Nan not Grandma to the point I feel she would be prepared have a show down and debate about it in front of my 3 children! So I always duly remembered to refer her as 'Nan' or 'Nanna' to my children. This puzzles me why does my MIL feels so strongly about it? Is Nan a more prestige title than Grandma? In fact I thought MIL was rather rude to insist being called that, cos my mother died a year before my 1st baby was born. I felt she wasn't respecting my mother. Isn't the word 'Nan' is for mother's side of the family? My MIL has 12 grandchildren, a half of them by her sons, and she still strongly insists she's labelled "Nan" by all of them and is prepared to fight for the title??! Which is utterly daft and I also think she's a bit of a bully don't you? I have had always called my mother's mother's grandma and I am happy to be called grandma or whatever by my future grandchildren when I am old!