He married firstly in 1682 to Jean Gilmour, daughter of
Sir John Gilmour of
Craigmillar, the Lord President of the Court of Session, and sister of
Sir Alexander Gilmour, 1st Baronet. Together, Steuart and Gilmour had: •
Sir John Steuart, 2nd Baronet (–1753) His second wife, from 1692, was Helen Cockburn, daughter of
Sir Alexander Cockburn of
Langton. Their children included: • Helen Steuart (1696–1774), who married
Sir Gilbert Elliot, 2nd Baronet, of Minto •
Archibald Stewart (1697–1780), the
Lord Provost of Edinburgh. Sir Robert died in 1707. After his sons death in 1753, the title passed to his grandson, Sir John Steuart of Allanbank, 3rd baronet (1714–1796), then to his son, Sir John Steuart of Allanbank, 4th baronet (1754–1817), and lastly to Sir John James Steuart of Allanbank, 5th baronet (1779–1849). ==See also==