the son of your stepmother or stepfather
Stepbrother
the daughter of your stepmother or stepfather
Stepsister
someone without brothers or sisters
only child
brothers and sisters
your aunt and uncle's children
your mother's mother
maternal grandmother
your brother's or sister's son
nephew
your father's mother
paternal grandmother
your mother's father
maternal grandfather
your brother or sister's daughter
niece
your sister's husband
brother-in-law
