 Angus Macnab was brother-in-law of John III Comyn, Lord of Badenoch who was murdered by Robert the Bruce in 1306.Macnab then joined forces with the Clan MacDougall in their campaign against the Bruce when Bruce was nearly captured at the Battle of Dalrigh.When the Bruce's power consolidated after his victory at the Battle of Bannockburn in 1314, the Macnab lands were forfeited and their charters were destroyed.