The Stuart, later Crichton-Stuart Baronetcy, of Bute, was created in the Baronetage of Nova Scotia on 28 March 1627.
The Steward, later Stuart Baronetcy, of Hartley Mauduit in the County of Southampton, was created in the Baronetage of England on 27 June 1660 for Nicholas Steward, Chamberlain of the Exchequer and Member of Parliament for Lymington.
The second Baronet, grandson of the first, was also Chamberlain of the Exchequer and represented Southampton and Hampshire in the House of Commons.
In 1829, on the death of his grandfather John Luttrell-Olmius, 3rd Earl of Carhampton (on whose death the earldom became extinct; see Earl of Carhampton), the fifth Baronet was offered a fresh patent of the earldom by King George IV.
His son, George Okill Stuart, Jr., was a lawyer, judge and political figure.