Théobald Dillon (1745, Dublin – 1792, near Lille) was count of Dillon and an Irish-born general in the French army. He was the grandson of Arthur Dillon, the nephew of the bishop Arthur Richard Dillon and the cousin of general Arthur Dillon (who also had a brother named Theobald).
On 29 April 1792, following the loss of a skirmish with Austrian forces, Dillon was murdered by his own troops outside the city of Lille. The troops apparently believed that their defeat by the Austrians was the result of a conspiracy on the part of Dillon, whom they called a "traitor and aristocrat."1
- Relation de l'assassinat de M. Théobald Dillon, Maréchal-de-Camp, Commis à Lille, le 29 avril 1792." Imprimerie de Mignaret (May 4, 1792).