What's in a name?

I have three children from a first marriage who call my husband's parents by their first names, when our subsequent children and my nephews came along my Mil requested that they also use first names. I don't think they were quite ready to acknowledge their changed status as grandparents, even though they turned out to be wonderful GPs to all our children.

I have 3 step grandchildren who all just call me by my first name probably because they were older when they joined our family. If they wanted to call me Granny I wouldn't mind.

My step GC all call me by my first name - saves anyone getting offended.