Iroquois kinship is a kinship system used to define family

Family

In human context, a family is a group of people affiliated by consanguinity, affinity, or co-residence. In most societies it is the principal institution for the socialization of children...

. Identified by Lewis Henry Morgan in his 1871 work Systems of Consanguinity and Affinity of the Human Family, the Iroquois system is one of the six major kinship systems (Eskimo

Eskimo kinship

Eskimo kinship is a concept of kinship used to define family in anthropology. Identified by Lewis Henry Morgan in his 1871 work Systems of Consanguinity and Affinity of the Human Family, the Eskimo system was one of six major kinship systems .-Kinship system:The Eskimo system places no...

, Hawaiian

Hawaiian kinship

Hawaiian kinship is a kinship system used to define family. Identified by Louis Henry Morgan in his 1871 work Systems of Consanguinity and Affinity of the Human Family, the Hawaiian system is one of the six major kinship systems .-Kinship system:Within common typologies, the...

, Iroquois, Crow

Crow kinship

Crow kinship is a kinship system used to define family. Identified by Lewis Henry Morgan in his 1871 work Systems of Consanguinity and Affinity of the Human Family, the Crow system is one of the six major kinship systems .-Kinship system:The system is somewhat similar to the Iroquois system, but...

, Omaha

Omaha kinship

Omaha kinship is the system of terms and relationships used to define family in Omaha tribal culture. Identified by Lewis Henry Morgan in his 1871 work Systems of Consanguinity and Affinity of the Human Family, the Omaha system is one of the six major kinship systems which he identified...

, and Sudanese

Sudanese kinship

Sudanese kinship is a kinship system used to define family. Identified by Lewis Henry Morgan in his 1871 work Systems of Consanguinity and Affinity of the Human Family, the Sudanese system is one of the six major kinship systems .The Sudanese kinship system is the most complicated...

).
The system has both classificatory and descriptive terms. In addition to gender and generation, Iroquois kinship also distinguishes between parental siblings of opposite sexes.