Tikopia
Traditional Tikopia (Solomon Islands) society did not practice adoption as it is traditionally understood in Western societies. It was not uncommon for families to rear children left parentless, and childless adults would sometimes take the child of another family and bring it up. The children, however, retained the tribal affiliation of their biological fathers, and inherited land only from the property of the paternal lineage, not from the property of the lineage of the guardian.
Read more about this topic: Cultural Variations In Adoption