I find that a lot of times it the child who decides what name they call you. My one niece called my mom Dingo because she ware earrings that hung down. My son called her Grandma and my dad was Papa.his other grandma was Grammy he didn't know his Grandpa on that side as he was passed away. My son also wouldn't call my girlfriend by her name as it was the same as mine she was Lala only his mom was Linda.