Your grandmother's brother's wife is your great aunt.
Your grandmother's grandmother is your great-great-grandmother.
Great Grandmother
Your grandmother's mother would be your great-grandmother.
Your grandmother's mother would be your great-grandmother.
Mother in-law
She is your paternal grandmother.
In Marathi, you would call your grandmother "เคเคเฅ" (pronounced as "Aaji").
Sugar Daddy
Gram? is that her grandmother if it is then it is your great grandmother
In Malayalam, grandmother is called "ammachi" or "achamma".
Your father's grandmother is typically referred to as your great-grandmother.