Casatus
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
In old European law. A vassal or feudal tenant possessing a casata (q. v.), that is, having a house, household, and property of his own. The cassati embraced both bond and free tenants.
Spelman.