James Butler, 1st Duke of Ormonde, English-Irish general, academic, and politician, Lord Lieutenant of Ireland (died 1688)

Lieutenant-General James FitzThomas Butler, 1st Duke of Ormond, KG, PC, was an Anglo-Irish statesman and soldier, known as Earl of Ormond from 1634 to 1642 and Marquess of Ormond from 1642 to 1661. Following the failure of the senior line of the Butler family, he was the second representative of the Kilcash branch to inherit the earldom.

Lord Lieutenant of Ireland, or more formally Lieutenant General and General Governor of Ireland, was the title of the chief governor of Ireland from the Williamite Wars of 1690 until the Partition of Ireland in 1922. This spanned the Kingdom of Ireland (1541–1800) and the United Kingdom of Great Britain and Ireland (1801–1922). The office, under its various names, was often more generally known as the Viceroy, and his wife was known as the vicereine. The government of Ireland in practice was usually in the hands of the Lord Deputy up to the 17th century, and later of the Chief Secretary for Ireland.