protojustitiarius Save DMLBS protojustitiarius [protos < πρῶτος+ML justitiarius] , first or foremost justiciar, chief justice. s1232 rex ‥ Hubertum de Burgo, prothojustitiarium regni, ab officio suo ‥ amovit M. Par. Maj. III 220 (cf. SelCh 324: protojustitiarium).