The Hurkiya society is divided into six endogamous patrilineages called raths. Alur clans are in fact a number of patrilineages living together. Most clans have around five patrilineages but the Ukuru clan has 11 patrilineages. By 1820 the other patrilineages worked together to prevent an Atyak man from becoming Rwoth. These patrilineages can include large numbers of men, all descendants of the same man.