Thomas IV de Bermingham, 1st Earl of Louth, 19th Baron Athenry, 1717–1799
Thomas was the last legally attested Baron Athenry. Among those who unsuccessfully claimed the lordship after him was the family of John Birmingham (astronomer). His property was divided between his three female heirs and their families. He became Earl of Louth in 1777, a title previously held by John de Bermingham, 1st Earl of Louth, a cousion of his ancestor, Rickard de Bermingham. The surname is still to be found in County Galway.
He is buried in the Dominican Friary, Athenry, founded by his ancestor in 1241.
| Preceded by Francis II de Bermingham |
Baron Athenry | Succeeded by Dormont |