No public IJR answers mention Adam, Earl of Angus yet. As people ask about it and share their answers, they'll appear here.
Overview
Adam, ruled from sometime prior to 1189 as Mormaer of Angus. Almost nothing is known of him, but it is fairly certain that he was the son of Gille Brigte, the previous Mormaer. He died young and was succeeded by his younger brother Gille Críst.