Your grandmother's mother is your great grandmother.
If she's not your mother, that would make her your Aunt.
Your mothers grandmothers children are each others siblings.
If the grandmother has custody
great grandma
Marge's mother is Jacqueline Bouvier.Homer's mother was Mona Simpson.
his mother name was Nancy turner
That depends, if you are referring to grandmothers as in a group or multiple grandmothers no, if you implying it belongs to a singular grandomother it would be "grandmother's" and finally if its something possessed by multiple grandmothers it would be "grandmothers'"
No it can be used for any grand mother
Sisters, mother, aunts, grandmothers, nieces, cousins, etc.
There's no such thing. You have two grandmothers: Maternal (mother's mother) and paternal (father's mother). Fraternal means "brother."
Your maternal grandmother is the mother of your mother. Similarly your paternal grandmother is the mother of your father, paternal grandfather is father of your father and maternal grandfather is father of your mother.
A grandma is either your mother's mother or your father's mother.