Katherine de Beaumont
Katherine de Beaumont (died 1368) was the daughter of Henry de Beaumont, Earl of Buchan, and his wife Alice Comyn. She married David III Strathbogie, titular Earl of Atholl and a leading supporter of Edward Balliol.
David was killed at the Battle of Culblean in 1335, after which the Scottish Guardian Andrew Moray besieged her in Lochindorb Castle; Edward III relieved her there in 1336. Her son David later claimed the earldom of Atholl, and she died in 1368.