The MacTaggart-Stewart baronetcy, of Southwick in the Stewartry of Kirkcudbright, and Blairderry in the County of Wigtown, was a title in the Baronetage of the United Kingdom. It was created on 7 October 1892 for Mark John Stewart, who represented Wigtown Burghs from 1874 to 1880, and Kirkcudbrightshire from 1885, in the House of Commons. He added the surname MacTaggart in 1896 to 1906 (with some months in 1910).
The title became extinct on the death of the 2nd Baronet, his fourth son, in 1948.
MacTaggart-Stewart baronets, of Southwick and Blairderry (1892) Sir Mark John MacTaggart-Stewart, 1st Baronet (1834–1923) Sir Edward Orde MacTaggart-Stewart, 2nd Baronet (1883–1948)
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