Who was born at the same time as you?
twin
Who was born before you and is a boy?
Brother
Who was born before your grandmother?
Great-grandmother
Who was born before you and is a girl?
Sister
Who was born after you and is a boy?
Baby brother
Great-grandfather
Great-grandfather
Who is your father's father?
Grandfather / Grandpa
Who gave birth to you and raised you until now?
Mom / Mother
Who is your mother's mother?
Grandmother / Grandma
Who was born after you and is a girl?
Baby sister