The Justiciar of Scotia (in Norman-Latin, Justiciarus Scotie) was the most senior legal office in the High Medieval Kingdom of Scotland.
The institution has some Anglo-Norman origins, but in Scotland north of the Forth it represented some form of continuity with an older office, a senior version of a Judex or Brithem, a native Scottish lawman often with province-wide responsibilities.
By the middle of the thirteenth century, the responsibilities of the Justiciar became fully formalised.
He supervised the activity and behaviour of royal sheriffs and sergeants, held courts and reported on these things to the king personally.
The sources, especially in the twelfth century, are far from exhaustive, and so many names are doubtless missing.