The Oraons have no proper subcastes in the Central Provinces, but the
Kudas and Kisans, having a distinctive name and occupation, sometimes
regard themselves as separate bodies and decline intermarriage with
other Oraons. In Bengal Sir H. Risley gives five divisions, Barga,
Dhanka, Kharia, Khendro and Munda; of these Kharia and Munda are the
names of other tribes, and Dhanka may be a variant for Dhangar. The
names show that as usual with the tribes of this part of the country
the law of endogamy is by no means strict. The tribe have also a
large number of exogamous septs of the totemistic type, named after
plants and animals. Members of any sept commonly abstain from killing
or eating their sept totem. A man must not marry a member of his own
sept nor a first cousin on the mother's side.