Justiciar
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In old English law. A judge or justice. One of several persons learned in the law, who sat in the aula regis, and formed a kind of court of appeal in cases of difficulty.
— High jnsticier. In old French and Canadian law. A feudal lord who exercised the right called "high justice." Guyot, Inst. Feod. c. 26.