BBC - History - Before You Start Your Family Tree

BBC - History - Before You Start Your Family Tree

uncle the brother of your father or mother
aunt the sister of your father or mother
sibling your brother or sister
cousin the son or daughter of your uncle or aunt
second cousin the son or daughter of either parent's first cousin
nephew the son of your brother or sister
niece the daughter of your brother or sister
grandfather the father of your father or mother
grandmother the mother of your father or mother
grandson your child's son
granddaughter your child's daughter
great grandfather the father of one of your grandparents
great grandmother the mother of one of your grandparents
great uncle the uncle of one of your parents
great aunt the aunt of one of your parents

father-in-law the father of your spouse
mother-in-law the mother of your spouse
stepson the son of your spouse's former marriage
stepdaughter the daughter of your spouse's former marriage
stepmother your father's second (or subsequent) wife
stepfather your mother's second (or subsequent) husband
half-brother the male offspring from the remarriage of one of your parents
half-sister the female offspring from the remarriage of one of your parents