extended family

:  a family that includes in one household near relatives (such as grandparents, aunts, or uncles) in addition to a nuclear family Given space, there are ways in which even larger populations than the extended family can be accommodated under one roof. — Paul Oliver; also :  an extensive group of people who are related by blood or marriage or who otherwise regard themselves as a large family Four out of every five people who go through a first divorce remarry … . Thus it is that husbands and wives, their former partners, children and stepchildren, and a whole constellation of grandparents and other relatives are brought together in the new American extended family. — Michael Norman During his five years at Owen High, he turned his teams into an extended family and tried to instill in his players the same sense of self-worth that Baldwin had imparted to him years before. — William Nack