Kin Groups and Descent. The Apiaká distinguish themselves from other groups like the Kayabí, as well as from Whites. Some show evidence of identity crisis, probably a result either of long and intense contact with Whites or because the Apiaká no longer constitute a homogeneous group in terms of ethnic ancestry. There are those who, on an ideal level, identify themselves with the nomadic Apiaká group, "our relatives from the forest."
Kinship Terminology. The Apiaká have adopted Portuguese (Brazilian) kinship terminology including the compadrazgo (cogodparenthood) system and its corresponding relationship terms.