The Molyneux baronetcy, of Castle Dillon, County Armagh, was created in the Baronetage of Ireland on 4 July 1730 for Thomas Molyneux, an Irish physician. He became a Fellow of the Royal Society in 1686.
Molyneux baronets of Castle Dillon, County Armagh (1730) Sir Thomas Molyneux, 1st Baronet (1661–1733) Sir Daniel Molyneux, 2nd Baronet (1708–1738) Sir Capel Molyneux, 3rd Baronet, PC (1717–1797) Sir Capel Molyneux, 4th Baronet (1750–1832) Sir Thomas Molyneux, 5th Baronet (1767–1841) Sir George King Adlercron Molyneux, 6th Baronet (1813–1848) Sir Capel Molyneux, 7th Baronet (1841–1879) Sir John William Henry Molyneux, 8th Baronet (1819–1879) Sir John Charles Molyneux, 9th Baronet (1843–1928) Sir Ernest Molyneux, 10th Baronet (1865–1940)
The title became extinct on the 10th baronet's death in 1940.
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