Baron Massy, of Duntrileague in the County of Limerick, is a title in the Peerage of Ireland. It was created in 1776 for Hugh Massy, who had previously represented County Limerick in the Irish House of Commons. His son, the second Baron, also represented this constituency in the Irish Parliament. His great-grandson, the sixth Baron, sat in the House of Lords as an Irish Representative Peer from 1876 to 1915. As of 2014 the title is held by the latter's great-great-grandson, the tenth Baron, who succeeded his father in 1995.
Eyre Massey, 1st Baron Clarina, was the younger brother of the first Baron Massy.
Barons Massy (1776)
- Hugh Massy, 1st Baron Massy (1700–1788)
- Hugh Massy, 2nd Baron Massy (1733–1790)
- Hugh Massy, 3rd Baron Massy (1761–1812)
- Hugh Hamon Massy, 4th Baron Massy (1793–1836)
- Hugh Hamon Ingoldsby Massy, 5th Baron Massy (1827–1874)
- John Thomas William Massy, 6th Baron Massy (1835–1915)
- Hugh Somerset John Massy, 7th Baron Massy (1864–1926)
- Hugh Hamon Charles George Massy, 8th Baron Massy (1894–1958)
- Hugh Hamon John Somerset Massy, 9th Baron Massy (1921–1995)
- David Harmon Somerset Massy, 10th Baron Massy (born 1947)
The heir apparent is the present holder's brother Hon. John Hugh Somerset Massy (born 1950).
The heir apparent's heir apparent is his son Luke John Somerset Massy (born 1984).
- Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990,
- Leigh Rayment's Peerage Pages