Theobald Butler, 1st Baron Cahir (of the second creation) (died 1596) was the son of Piers Butler of Cahir and the nephew of Thomas Butler, 1st Baron Cahir (of the first creation). As Theobald's first cousin Edmund, the 2nd Baron, died without issue, the title became extinct. It was, however, revived on May 6, 1583 in Theobald's favour. He became the 1st Baron Cahir (of the second creation) and ruled much of the barony of Iffa and Offa West.
He married Mary Cusack, daughter of Sir Thomas Cusack of Cussington, County Meath, Lord Chancellor of Ireland, and his second wife Maud Darcy. He was invested as a Knight on 14 February 1566/67 at Clonmel. His last will was dated 27 November 1593. He died on 28 April 1596 at Cahir, County Tipperary. He had issue-