Alexander Comyn, Earl of Buchan

Alexander Comyn, second Earl of Buchan (c. 1217–1289), was a leading Scoto-Norman magnate and chief counsellor of King Alexander III. The son of William Comyn and Marjory of Buchan, he served as Justiciar of Scotia from 1258.

In 1284 he joined the nobles who recognised Margaret of Norway as heir, and after Alexander III's death he was one of the Guardians of Scotland from 1286 until he died in 1289. He left many children, including his heir John.