Background
Massy was the son of Colonel Hugh Massy and the elder brother of General Eyre Massey, 1st Baron Clarina.
Massy was the son of Colonel Hugh Massy and the elder brother of General Eyre Massey, 1st Baron Clarina.
Subsequently he represented Old Leighlin until 1777. In 1776 he was raised to the Peerage of Ireland as Baron Massy, of Duntrileague in the County of Limerick.
He was appointed High Sheriff of County Limerick for 1739 and was a Member of the Irish House of Commons for Limerick County between 1759 and 1776.