When we think of kinship, we usually think of ties between people based upon blood or marriage. But we also have other ways—nowadays called ‘performative’—of establishing kinship, or hinting at kinship: many Christians have, in addition to parents, godparents; members of a trade union may refer to each other as ‘brother’ or ‘sister’. Similar performative ties are even more common among the so-called ‘tribal’ peoples that anthropologists have studied and, especially in recent years, they have received considerable attention from scholars in this field.