He was invested as a Privy Counsellor (P.C.). He was created 1st Lord of Garlies [Scotland] on 19 July 1607. He was created 1st Earl of Galloway [Scotland] on 19 September 1623, with a special remainder to his heir's male bearing the name Stewart.

Sir Alexander Stewart was a favorite of James VI (James I of England), who knighted him in 1590 at the coronation of his consort, Queen Anne of Denmark. Sir Alexander married (first) Christian Douglas, daughter of Sir William Douglas, and (second) the Lady Elizabeth Douglas, daughter of David, Earl Angus, and widow of John, seventh Lord Maxwell (Earl of Morton). He died on October 9, 1649, leaving five children. Sir Alexander Stewart was elevated to the peerage, July 19, 1607, by the title of Baron of Garlies, and on September 19, 1623, was advanced to the Earl of Galloway.

• https://www.wikitree.com/wiki/Stewart-6473
• https://ancestors.familysearch.org/en/LT45-6CV/sir-alexander-stewar...
• https://www.wikiwand.com/en/articles/Alexander_Stewart,_1st_Earl_of...