Thomas Butler, Viscount Thurles (before 1596 – 1619) was the son and heir apparent of Walter Butler, 11th Earl of Ormond (1559–1633), whom he predeceased. He lived at the Westgate Castle in Thurles, County Tipperary. He was accused of treason but drowned in a shipwreck off the Skerries in the Irish Sea, before he could be judged. He was the father of the Irish statesman and Royalist commander James Butler, 1st Duke of Ormonde.
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