Crow kinship terminology is one of the six major kinship-terminology systems Lewis Henry Morgan classified, first studied together with the Omaha system in 1859 and formally classified in his 1871 Systems of Consanguinity and Affinity of the Human Family. It is associated with matrilineal societies and, unlike most kinship terminologies, deliberately collapses generational distinctions on the father's side: relatives of Ego's father's matrilineage are distinguished only by their sex, regardless of their age or generation, while relatives on Ego's own mother's side receive more descriptive, generation-specific terms. Structurally the Crow system is close to a mirror image of the Omaha system, which uses the same generation-collapsing logic on the mother's side of a patrilineal society instead. The system is named for the Crow Nation of Montana and has also been documented among the Hopi and the Navajo Nation of the southwestern United States. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Descent RuleSourced to the subject's own accountAssociated with matrilineal descent: relatives on the father's matrilineage are grouped by sex alone, collapsing generation, while the mother's own matrilineal side keeps distinct generational terms; often described as a mirror image of the patrilineal Omaha system. 1 Descent RuleSourced to the subject's own accountThe system also uses bifurcate merging, distinguishing collateral relatives of different gender in Ego's own descent group: a father's brother is addressed by the same term as father, while a mother's brother is given the separate term uncle. 1 Typical RegionSourced to the subject's own accountNamed for the Crow Nation of Montana; also documented among the Hopi and the Navajo Nation of the southwestern United States. 1 Descent Rule
Descent Rule (category)Sourced to the subject's own account Descent Rule (category)Sourced to the subject's own account Connections
Associated With
The Crow system is associated with matrilineal societies and collapses generational terms on the father's, non-matrilineal, side.
Source Wikipedia: Crow Kinship
Held Differently
Structurally close to a mirror image of the matrilineal Crow system: the same generation-collapsing logic applied to the opposite, non-descent, side.
Source Wikipedia: Omaha Kinship
In Rule Category
Entity-backed identity for the descent-rule category this kinship system already carries as an enum fact, resolved to a kinship-system entity by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The enum fact itself stays on the entity unchanged.
Entity-backed identity for the descent-rule category this kinship system already carries as an enum fact, resolved to a kinship-system entity by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The enum fact itself stays on the entity unchanged.
Studied By
The Crow kinship terminology system, named for the Crow people whose usage typifies it, is one of the six classificatory systems Lewis Henry Morgan defined.
Sources
1. Wikipedia: Crow Kinship
WikipediaKinship system section
The relatives of the subject's father's matrilineage are distinguished only by their sex, regardless of their age or generation.
- Overview
Kinship system section, bifurcate merging paragraph
the Crow uses bifurcate merging, meaning that there is a distinction between collateral relatives of different gender in Ego's descent group. In this case, father's brother would be called "father's brother", and mother's brother would be called "uncle".
- Associated With: Matrilineal Descent
View the Source Wikipedia: Omaha Kinship
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