Clan Macnab Macnab family is on a charter of 1124. Malcolm de Glendochart appears in the Ragman Rolls of 1296 and submitted to Edward I of England. 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. The fortunes of the Clan Macnab
Robert the Bruce eventually lifted Bruce's excommunication. In May 1328 King Edward III of England signed the Treaty of Edinburgh-Northampton, which recognised Scotland as an independent kingdom, and Bruce as its king. In 1325 Robert I exchanged lands at Cardross for those of Old Montrose in Angus with Sir David Graham. It was to be here that Robert would build the manor house that would serve as his favoured residence during the final years of his reign. The extant chamberlain's accounts for 1328 detail a manor house at Cardross with king's and queen's chambers and glazed windows, a chapel, kitchens, bake- and brew-houses,