Definition of Fief d’haubert (or d’hauberk)
Fr. In Norman feudal law, a fief or fee held by the tenure of knight-service; a knight’s fee. 2 Bl.Comm. 62. A fee held on the military tenure of appearing fully armed on the ban and arriere-ban.
That's the definition of Fief d’haubert (or d’hauberk) in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.
