Alexander Bruce, Earl of Carrick (died 1333) was the Natural son of Edward Bruce

Edward Bruce

Edward the Bruce , sometimes modernised Edward of Bruce, was a younger brother of King Robert I of Scotland, who supported his brother in the struggle for the crown of Scotland, then pursued his own claim in Ireland. He was proclaimed High King of Ireland, but was eventually defeated and killed in...

 and his mistress, Isabel, daughter of John de Strathbogie, 9th Earl of Atholl

John de Strathbogie, 9th Earl of Atholl

John of Strathbogie was warden and Justiciary of Scotland.-Early years and family:John was born in Atholl, Perthshire, Scotland around 1266. He was the son of David I Strathbogie, Earl of Atholl , by his spouse Isabel, daughter of Richard de Dover, Baron of Chilham, Kent...

.

He played an ambivalent role during Edward Balliol

Edward Balliol

Edward Balliol was a claimant to the Scottish throne . With English help, he briefly ruled the country from 1332 to 1336.-Life:...

's first invasion of Scotland. For a time he fell in with Balliol, but then he rejoined the Bruce loyalist side.

He was killed fighting on the Scottish side at the Battle of Halidon Hill

Battle of Halidon Hill

The Battle of Halidon Hill was fought during the Second War of Scottish Independence. Scottish forces under Sir Archibald Douglas were heavily defeated on unfavourable terrain while trying to relieve Berwick-upon-Tweed.-The Disinherited:...

.
Alexander was the reputed first husband of Eleanor Douglas, daughter of Sir Archibald Douglas

Sir Archibald Douglas

Sir Archibald Douglas was a Scottish noble, Guardian of Scotland and military leader. He is sometimes given the epithet "Tyneman" , but this may be a reference to his great-nephew Archibald Douglas, 4th Earl of Douglas.-Early life:The younger son of Sir William "le Hardi" Douglas, the Governor of...

. It is reputed that they had a daughter:

• Eleanor de Brus, who reputedly married Sir William de Cunynghame of Kilmaurs.