Family - Familie
Parents - Eltern
Mother - Mutter
Mom - Mama
Father - Vater
Dad - Papa
Child - Kind
Children - Kinder
Brother - Bruder
Big brother - großer Bruder
Little brother - kleiner Bruder
Sister - Schwester
Big Sister - große Schwester
Little Sister - kleine Schwester
Son - Sohn
Daughter - Tochter
Grandmother - Großmutter
Grandma - Oma
Grandfather - Großvater
Grandpa - Opa
Great-grandmother - Urgroßmutter
Great-grandfather - Urgroßvater
Aunt - Tante
Uncle - Onkel
Cousin - Cousin (male) (spoken like the french word), Cousine (female)
Wife - (Ehe)frau
Husband - (Ehe)mann
Boyfriend - Freund
Girlfriend - Freundin
Stepmother - Stiefmutter
Stepfather - Stiefvater
Stepbrother- Stiefbruder
Stepbrother - Stiefbruder
That's my mother - Das ist meine Mutter
That's my brother - Das ist mein Bruder
That's my girlfriend - Das ist meine Freundin