John O'Neill was born in Shane's Castle, County Antrim, and served as member of parliament for Randalstown from 1761 to 1793. He supported Catholic Emancipation and was raised to the peerage of Antrim in 1793 and created a viscount in 1795. In 1798 he was, as the Governor of Antrim, involved in the battle which took place there during the rebellion, and was killed by his own park-keeper.

Born:	16 January 1740
Died:	18 June 1798