Abpatruus
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Lat. In the civil law. A great-great-grandfather's brother, (abavi frater.) Inst. 3, 6, 6; Dig. 38, 10, 3. Called patruus maximus.
Id. 38, 10, 10, 17.
Called, by Bracton and Fleto, abpatruus magnus.
Bract. foL 68b; Fleto, lib. 6, c. 2, § 17.