relatives - parientes
grandchildren - nietos
granddaughter - nieta
grandson - nieto
aunt - tia
uncle - tio
niece - sobrina
nephew - sobrino
mother-in-law - suegra
father-in-law - suegro
daughter-in-law - nuera
son-in-law - yerno
sister-in-law - cuñada
brother-in-law - cuñado
godparents - padrinos
godfather - padrino
godmother - madrina
cousin (male) - primo
cousin (female) - prima
first cousin (male) - primo hermano
first cousin (female) - prima hermana
stepfather - padrastro
stepmother - madrastra
stepbrother - hermanastro
girlfriend - novia
boyfriend - novio