Individuals who are accepted into a family that is not their legal or biological family are called kinkeepers social convoys generative allies fictive kin

The correct answer is fictive kin.

Explanation:

Fictive kin is a term used in Sociology to refer to family members who don't have blood ties or marriage ties. The reasons for choosing fictive kin could be religious rituals, closer friendships or other relationships that involve social and economic aspects. An example of fictive kin is adopted, children.

Nowadays, the Fictive kin's term has helped to analyze immigrant communities as well as foreign fighters. This term is also used in Anthropology. However, anthropologists consider that the relationships named as "kinship" could be based on aspects related to the fact of sharing residence, sharing economic relationships, or any kind of interaction rather than blood ties or marriage ties.