Muir

The Muirs, also spelled Mure, were a knightly family of Ayrshire in southwest Scotland; their surname comes from the Scots word more, meaning moor or fen. The family held Polkelly near Kilmarnock before Sir Gilchrist Mure helped secure Rowallan Castle through his service at the Battle of Largs in 1263.

Sir Adam Mure of Rowallan was the father of Elizabeth Mure. She formed a secular union with Robert Stewart, High Steward of Scotland and the future Robert II, around 1336; after a papal dispensation they remarried in 1349.

She died before 1355, but her sons included Robert III and Robert Stewart, Duke of Albany, and doubts over the validity of her marriage fed later succession disputes. The Muirs went on holding Rowallan for centuries.