Sir James Steuart of Coltness (1608 – 31 March 1681) was a Scottish merchant, banker, landowner, politician and Covenanter.

[2][3] Marion was sister of Sir James Carmichael, Justice General of Scotland.

[4] He was a merchant and banker in Edinburgh, acquired a large fortune, then acquired the estates of Kirkfield (from Sir John Somerville of Cambusnethan) and Coldness (from Sir John Hamilton of Edston), both in Lanarkshire, in 1653.

[2] He became a burgess of Edinburgh and guild member in 1631, apparently through his marriage to Thomas Hope's niece.

[7] Together, they had:[8] In 1648, two years after Anne's death, Steuart married Marion McCulloch Elliott (d. 1690), widow of Sir John Elliott, and only daughter and heiress of David McCulloch, of Goodtrees.