Sir Thomas de Brus was a younger brother of King Robert I of Scotland

Robert I of Scotland

Robert I , popularly known as Robert the Bruce , was King of Scots from March 25, 1306, until his death in 1329.His paternal ancestors were of Scoto-Norman heritage , and...

, who supported his brother in the struggle for the crown of Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. He was captured by forces at Loch Ryan

Loch Ryan

Loch Ryan is a Scottish sea loch that acts as an important natural harbour for shipping, providing calm waters for ferries operating between Scotland and Northern Ireland...

, Galloway

Galloway

Galloway is an area in southwestern Scotland. It usually refers to the former counties of Wigtownshire and Kirkcudbrightshire...

, Scotland and later executed as a traitor.

Born c. 1284 at Carrick

Carrick, Scotland

Carrick is a former comital district of Scotland which today forms part of South Ayrshire.-History:The word Carrick comes from the Gaelic word Carraig, meaning rock or rocky place. Maybole was the historic capital of Carrick. The county was eventually combined into Ayrshire which was divided...

, Ayrshire

Ayrshire

Ayrshire is a registration county, and former administrative county in south-west Scotland, United Kingdom, located on the shores of the Firth of Clyde. Its principal towns include Ayr, Kilmarnock and Irvine. The town of Troon on the coast has hosted the British Open Golf Championship twice in the...

, Scotland a son of Robert de Brus, 6th Lord of Annandale and Margaret, Countess Of Carrick

Marjorie, Countess of Carrick

Marjorie of Carrick was countess of Carrick, Scotland, from 1256 to 1292, and is notable as the mother of Robert the Bruce.-Marriages:...

. He was married to Helen Erskine. While leading an invasion force with his brother Alexander de Brus

Alexander de Brus

Alexander de Brus was a younger brother of King Robert I of Scotland, who supported his brother in the struggle for the crown of Scotland. He was captured by forces at Loch Ryan, Galloway, Scotland and later executed as a traitor....

 composed of eighteen galleys, landing at Loch Ryan. The invasion force was quickly overwhelmed by local forces, led by Dougal MacDougal, who was a supporter of the Comyns

John III Comyn, Lord of Badenoch

John III Comyn, Lord of Badenoch and Lord of Lochaber or John "the Red", also known simply as the Red Comyn was a Scottish nobleman who was an important figure in the Wars of Scottish Independence, and was Guardian of Scotland during the Second Interregnum 1296-1306...

 and he and his brother were captured. He was later beheaded on 9 February 1307 in Carlisle, Cumberland

Cumberland

Cumberland is a historic county of North West England, on the border with Scotland, from the 12th century until 1974. It formed an administrative county from 1889 to 1974 and now forms part of Cumbria....

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

.