Thomas Bermingham, 1st Earl of Louth

Thomas Bermingham, 1st Earl of Louth (16 November 1717 – 11 January 1799) was an Anglo-Irish politician and peer. He was also the last man to be summoned to parliament as Baron Athenry.

Bermingham was the son of Francis Bermingham, 14th Baron Athenry, by his first marriage to Lady Mary Nugent, daughter of Thomas Nugent, 4th Earl of Westmeath. He was elected to the Irish House of Commons as Member of Parliament for County Galway, sitting between 1745 and 1750, when on 4 March 1750 he succeeded his father as Baron Athenry and became a member of the Irish House of Lords. He was invested as a member of the Privy Council of Ireland, but was ejected from it in 1767 by Lord Townshend, the newly arrived  Lord Lieutenant of Ireland, who wished to make a "clean sweep" of the Irish administration, removing all those he regarded as corrupt or inefficient. On 23 April 1759 Lord Athenry was created Earl of Louth in the Peerage of Ireland, a title previously held by John de Bermingham, 1st Earl of Louth, a cousin of his remote ancestor Rickard de Bermingham.

Marriages and children
He married, firstly, Jane Bingham, the daughter of Sir John Bingham, 5th Baronet, and Anne Vesey, in November 1745. He married, secondly, Margaret Daly, the daughter of Peter Daly and Elizabeth Blake, on 10 January 1750. He died in 1799 and is buried in the Dominican Friary at Athenry, founded by his ancestor in 1241. His property was divided between his three daughters and their families. He left no surviving male issue, so his earldom became extinct. The barony fell into abeyance and became dormant: among those who unsuccessfully claimed it after him were his grandson Thomas Sewell, and the family of John Birmingham.

His daughters were-
 * Elizabeth, who married firstly Thomas Bailey Heath Sewell (son of Sir Thomas Sewell, Master of the Rolls) secondly Francis Duffield and thirdly Joseph Russell
 * Mary, married William St Lawrence, 2nd Earl of Howth
 * Louisa, married firstly Joseph Blake, 1st Baron Wallscourt and secondly James Daly.

In recent research on Irish slave owning families, 'John Bermingham' was shown in 1798 as the owner of an estate called Dalgin 'a la cote orientale de Demerarie.' This may be John Bermingham commonly called Lord Baron Athenry but also conceivably his nephew John, son of Edward Bermingham and Ann Waddell, who died in 1811. In a Will of John Bermingham commonly called Lord Baron Athenry of Daligan House, Galway proved 27/06/1803. He left his real estate, including unspecified estates in South America and the West Indies, in trust for his three natural children, Michael, Thomas and Edward.