Butler married Mary Cusack, daughter of Sir
Thomas Cusack of Cussington,
County Meath,
Lord Chancellor of Ireland, and his second wife Maud Darcy. Theobald and Mary had six sons: •
Thomas Butler, 2nd Baron Cahir ( – 1627), his successor • Piers of Cloghcullie (Clocully),
County Tipperary, who married Eleanor, the daughter of Pierce Butler of
Callan, County Kilkenny and left a son
Thomas;, who became the 3rd Baron • Edmund Butler, died childless • Richard of Clonbrogan, the father of Pierce whose son
Theobald became the 5th Baron Cahir. • James of Knocklofty (died 1630), whose son Theobald (died 1630) was involved in the rebellion of 1598 • John, of Cloughbridy —and two or three daughters: • Ellen, married Richard Butler of Ballyboe, County Tipperary • Mary, married
Cormac MacDermot MacCarthy, 16th Lord of Muskerry, and was the mother of
Charles MacCarthy, 1st Viscount Muskerry • Eleanor (although her existence is debatable), who was said to have married John Butler, eldest son of James Butler, 2nd
Baron Dunboyne; but the claim, made in the course of an
inheritance dispute over the right to the Dunboyne title, was probably false. == Knight ==