Theobald Dillon, 7th Viscount Dillon

Theobald Dillon, 7th Viscount Dillon of Costello-Gallin (died 1691) was a supporter of King James II and was attainted on 11 May 1691 in the Williamite War. His attainting in 1691 was reversed in favour of the 8th Viscount on 20 June 1694.

Politics
In the 1680s he was lieutenant-colonel in Clanrickarde's Regiment of Guards. He had raised the Dillon Regiment in 1688 for James II, which fought in the Williamite war in Ireland. He was a Roman Catholic land-owning member in the Irish House of Lords of the Patriot Parliament of 1689, and was killed at the Battle of Aughrim in 1691. Before the Treaty of Limerick in 1691 the regiment had sailed to France and became part of the Irish Brigade that served the kings of France from 1690 to 1792.

Family
He married Mary, daughter of Sir Henry Talbot of Templeogue, Co. Dublin, and of Mount Talbot in County Roscommon, who was also outlawed in 1691. She was killed during the siege of Limerick in 1690. Their children included:
 * Henry, 8th viscount (d. 1714), father of the 9th viscount.
 * Arthur, father of the 10th and 11th viscounts Dillon.