There are three chieftaincy Houses in Finima namely: the Brown Royal (Founding) House, Tobin and Attoni (Minor/Sub) Houses. Finima was founded by Kongo, a royal prince from Ebenitoru, western Ijaw (Izon). The Brown House is the Major House both in tradition as well as contributes the greater percentage of indigenes, but all the other Sister Houses are related and traditionally co-operate, live and work together.

There is also a fourth Family Group: The Hart House, which came from the larger Bonny Group nearly 300 years ago as in-laws to the Brown House and though still bearing the family name of "Hart", are now considered Finima people in their own right and generally identifying with the Major Brown House in all traditional matters of governance.