Mother / Mom
Father / Dad
Son
Daughter
Brother
Sister

Grandfather
Grandmother
Grandson
Granddaughter

Uncle
Aunt
Cousin (male)
Cousin (female)
Nephew
Niece

Father-in-law
Mother-in-law
Brother-in-law
Sister-in-law
Son-in-law
Sister-in-law

Stepfather
Stepmother
Stepbrother
Stepsister

Padre / Papá
Madre / Mamá
Hijo
Hija
Hermano
Hermana

Abuelo
Abuela
Nieto
Nieta

Tío
Tía
Primo
Prima
Sobrino
Sobrina

Suegro
Suegra
Cuñado
Cuñada
Yerno
Nuera

Padrastro
Madrastra
Hermanastro
Hemanastra