Orrery, Roger Boyle, 1st earl of (1621–79), formerly Baron Broghill, fifth son of Richard
Boyle, 1st earl of Cork, and leader of the Old Protestants in Munster. Loans to Charles I by his father brought Boyle onto personal terms with the royal family. He was deputy in
Inchiquin's Munster command during the
Confederate War, becoming his pro‐parliamentary rival after the appearance in Cork of the parliamentarian Lord Lisle, lord lieutenant of Ireland (1646–7).
During the king's trial and execution, Boyle retired to Somerset. Oliver
Cromwell gave him the choice of service in Ireland or the Tower. Boyle brought key Munster towns and most of Inchiquin's soldiers over to parliament just as Cromwell's campaign was flagging. In April 1650 he destroyed Lord Muskerry's (see
clancarty) royalist‐confederate force at Macroom and executed the Catholic bishop, Boethius MacEgan.
Boyle served as governor of Scotland (1655–6) and was the chief sponsor of the Humble Petition and Advice (1657), an appeal to Cromwell to assume the crown. In Ireland he propped up Henry
Cromwell's rule and was granted Muskerry's lands at Blarney. As the protectorate fell apart in 1659–60 he became a supporter of the
Restoration.
As a lord justice he helped lay down the Act of
Settlement. Subsequently, as lord president of Munster and major‐general of the army, he disputed defence allocations with
Ormond but got his way over a long‐cherished
militia scheme. Amid fears of land redistribution and disgruntlement about being ignored as Ormond's successor, Boyle embarked on a vigorous anti‐Catholic persecution in Munster in 1671, which helped to provoke his dismissal as provincial president.
Boyle wrote a
Treatise on the Art of War (1677) and several allegorical plays on the theme of regicide for the London stage.
Hiram Morgan