Is qui cognoscit
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
The cognizor. See Fine of land.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Lat. The cognizor in a fine. Ia cui cognoscitur, the cognizee.