Crínán of Dunkeld
Crínán of Dunkeld, also called Crinan the Thane (c. 975 –1045), was the erenagh, or hereditary lay-abbot, of Dunkeld Abbey and, similarly to Irish "royal- and warrior-abbots" of the same period like the infamous case of Fedelmid mac Crimthainn, led armies into battle and was very likely also the Mormaer of Atholl during the events later fictionalized in William Shakespeare's verse drama The Tragedy of Macbeth. Although he does not appear in Shakespeare's play, he was the legitimately married son-in-law of King Malcolm II of Scotland, the father of King Duncan I of Scotland, and the grandfather of King Malcolm III of Scotland.