Marmaduke Thweng, 1st Baron Thweng

Sir Marmaduke Thweng (or Tweng, Thwinge etc.), later 1st Baron Thweng, was an English knight from Yorkshire who fought in the Wars of Scottish Independence.

The son of Sir Marmaduke Thweng of Kilton and his wife Lucy de Brus. His mother was the great, great granddaughter of Adam de Brus, Lord of Skelton brother to Robert de Brus, 1st Lord of Annandale, Thweng was also a vassal of Robert de Brus, 6th Lord of Annandale by virtue of the latter's fief in the North Riding, ties that would have far reaching effects during his career. He fought on the English side at the Battle of Stirling Bridge and the Battle of Bannockburn. He achieved some fame at Stirling Bridge by a heroic escape. Over 100 English knights had been trapped, together with several thousand infantry, on the far side of the river, and were being slaughtered by the Scots. Thweng managed to fight his way back across the bridge and he thus became the only knight of all those on the far side of the river to survive the battle.

Following the rout, Thweng with William FitzWarin were appointed castellans of Stirling Castle by the English leader John de Warenne, 6th Earl of Surrey. The castle was quickly starved into submission, and Thweng and FitzWarin were taken prisoner to Dumbarton Castle.

At Bannockburn, however, after the English defeat, Sir Marmaduke apparently made no attempt to escape. Instead he wandered over the battlefield until he located Robert the Bruce; only then was he prepared to surrender, and only to the victorious King. Robert recognised Sir Marmaduke and released him and Ralph de Monthermer, also captured, both without ransom, but not without first entertaining them at table.