Colibertus
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
One who, holding in free socage, was obliged to do certain services for the lord. A middle class of tenants between servile and free, who held their freedom of tenure on condition of performing certain services. Said to be the same as the conditionales.
Cowell.
COLLATERAL (Lat. con, with, latus, the side). That which is by the side, and not the direct line; that which is additional to or beyond a thing.