The son of one's son or daughter
grandson
The daughter of one's son or daughter
granddaughter
A man who is not their biological father, but is married to their parent
stepfather
Your male child
son
The daughter of your husband or wife from a previous relationship
stepdaughter
The children of your son or daughter
grandchildren
The female parent of a child
mother / mum
The son of your husband or wife from a previous relationship
stepson
The mother of one's husband or wife
mother-in-law
The sister of one's husband or wife
sister-in-law
The brother of your father or mother
uncle
The sister of your father or mother
aunt
The father of one's husband or wife
father-in-law
Your dad's or your mom's father
Grandfather
A girl or woman who has the same parents as you
sister
Your dad's or your mom's mother
Grandmother
A child of a your aunt or uncle
cousin
A boy or man who has the same parents as you
brother
Your male parent
father / dad
The father and mother of your father or mother
grandparents
A woman who is not their biological father, but is married to their parent
stepmother
A daughter of your brother, sister, brother-in-law, or sister-in-law.
niece
The brother of one's husband or wife
brother-in-law
A son of your brother, sister, brother-in-law, or sister-in-law.
nephew
Your female child
daughter