The Blennerhassett Baronetcy of Blennerville in the County of Kerry, is a title in the Baronetage of the United Kingdom. It was created on 22 September 1809 for the Anglo-Irish lawyer Rowland Blennerhassett,John Debrett, The Baronetage of England (F.C. and J. Rivington, 1819), 1178-9. He was from a family originally from Cumberland, England, that settled in County Kerry during the reign of James I and represented County Kerry and Tralee in the Irish House of Commons.
The 2nd Baronet was High Sheriff of Kerry in 1823. The 4th Baronet was a Liberal politician.
Blennerhassett baronets, of Blennerville (1809) Sir Rowland Blennerhassett, 1st Baronet (1741–1821) Sir Robert Blennerhassett, 2nd Baronet (1769–1831) Sir Arthur Blennerhassett, 3rd Baronet (1794–1849) Sir Rowland Blennerhassett, 4th Baronet (1839–1909) Sir Arthur Charles Francis Bernard Blennerhassett, 5th Baronet (1871–1915) Sir Marmaduke Charles Henry Joseph Blennerhassett, 6th Baronet (1902–1940) Sir (Marmaduke) Adrian Francis William Blennerhassett, 7th Baronet (1940–2022) Sir Charles Henry Marmaduke Blennerhassett, 8th Baronet (born 1975).
The heir apparent is the current baronet's only son Benjamin Casimir Marmaduke Blennerhassett (born 2015)
Extended family Rowland Ponsonby Blennerhassett, grandson of Rowland Blennerhassett, fourth son of the 1st Baronet, represented County Kerry in the House of Commons, elected in 1872.
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