[2] O'Malony was born at Kiltannon, County Clare, the son of Thomas O'Molony and Anne McMahon.
During the 1640s and 1650s in Paris, O'Malony became involved in several religious-political disputes, particularly relating to the activity of Irish students at the university.
[4] His efforts were successful and in 1677 the Irish College in Paris received a charter from Louis XIV.
O'Molony was soon suspected of complicity in the Popish Plot, and in 1679 he withdrew to rural Connaught for his safety; a £150 bounty had been offered for his capture.
In 1689 he condemned the failure of James's Jacobite Patriot Parliament to repeal Poynings' Law.
Upon the lifting of the siege, he left the city for France as part of a delegation sent by James II to request further French support for the war.