William Comyn, Earl of Buchan

William Comyn (1163–1233) was a Scottish noble who became Lord of Badenoch and, by marrying Marjory, Countess of Buchan, the first Comyn earl of Buchan. The son of Richard Comyn, he served William the Lion and rose to Justiciar of Scotia in 1205.

He campaigned against the rebel Meic Uilleim, beheading Gofraid mac Domnaill in 1213 and crushing their power by 1229, when he was granted Badenoch. His rise opened a century of Comyn dominance in Scotland, and he died in 1233.