Earl of Ossory
During King Henry VIII of England's pursuit of Anne Boleyn, who would be his second wife, he arranged for the main claimant to the earldom of Ormond, Piers Butler, to renounce all his claims to the titles in favour of Anne's father, Thomas Boleyn. Butler was rewarded for his compliance by being created Earl of Ossory on 22 February 1528.
In 1662, the eldest son of James Butler, 1st Duke of Ormonde was called to the Irish House of Lords on a writ of acceleration and became known as Thomas Butler, 6th Earl of Ossory. His father held the title "5th Earl of Ossory" as one of his subsidiary titles, which made Thomas Butler the 6th Earl by courtesy. He predeceased his father and thus never became Earl of Ormonde in his own right.
- Steven G. Ellis (17 June 2014). Ireland in the Age of the Tudors, 1447-1603: English Expansion and the End of Gaelic Rule. Routledge. p. 4. ISBN 978-1-317-90143-3.
- Great Britain. Record Commission (1830). State Papers: Published Under the Authority of His Majesty's Commission. King Henry the Eighth. G. Eyre and A. Strahan, printers to the King's Most Excellent Majesty. p. 301.