MAHON, Hon. Thomas (1766-1835), of Strokestown, co. Roscommon.

Published in The History of Parliament: the House of Commons 1790-1820, ed. R. Thorne, 1986
Available from Boydell and Brewer



1801 - 1802

Family and Education

b. 2 Aug. 1766, 1st s. of Maurice, 1st Baron Hartland [I] and bro. of Hon. Stephen Mahon*. educ. Portarlington sch.; Royal sch., Armagh; Trinity, Dublin 1782; St. John’s, Camb. 1786. m. 14 Oct. 1811, Catherine, da. of James Topping* of Whatcroft Hall, Cheshire, s.p. suc. fa. as 2nd Baron Hartland [I] 4 Jan. 1819.

Offices Held

MP [I] 1799-1800.

Ensign, 47 Ft. 1784, lt. 1790; maj. 32 Drag. 1794, 24 Drag. 1796; lt.-col. 9 Drag. 1797, brevet col. 1805; maj.-gen. 1811, lt.-gen. 1819.

Gov. co. Roscommon 1819.


Mahon was returned unopposed for the county on a vacancy in 1799 and, like his father, who was rewarded with a peerage, and his brother Stephen, supported the Union. He made no mark at Westminster, where, so he and his father claimed, he continued to support government. He was, however, unable to induce the Castle to take his part against the competitive Kingston interest in anticipation of the general election and declined rather than contest the seat in 1802. He subsequently resumed his military career, which prevented him from offering at the next election, when his place was taken by his brother Stephen. He died 8 Dec. 1835.

PRO 30/9/1, pt. 3/2, Hartland to Abbot, 21 Nov.; pt. 3/4, Mahon to Abbot, 3 Oct., reply 6 Oct. 1801.

Ref Volumes: 1790-1820

Author: Arthur Aspinall