Kin Groups and Descent. As noted above, the Muyu were organized in patrilineages, which were also territorial units. The nuclear family was a very important unit, which formed a household. In the present situation several lineages (about ten to twenty) live together in a village. The Muyu kinship system is probably based on the ideal marriage with a mother's brother's daughter, the so-called exclusive cross-cousin marriage.
Kinship Terminology. Kin terms followed the Iroquois system.