June 24 - An Act of the Parliament of Great Britain permits Charles Butler, 1st Earl of Arran, to purchase the Irish estates forfeited by his brother James Butler, 2nd Duke of Ormonde.
The office of Lord Chancellor of Ireland is the highest political office in the Parliament of Ireland; Viscount Midleton being the incumbent.
The title Baron Bessborough, of Bessborough, Piltown in the County of Kilkenny, is created in the Peerage of Ireland in favour of William Ponsonby.
Henry Jones, poet and tragedian (d. 1770)
Denis Maguire, Bishop (Catholic Church) (d. 1798)
Robert Murray, merchant (d. 1786)
John Ruxton, landowner and politician (d. 1785)
Richard Houston, mezzotint engraver (d. 1775)
Alexander Montgomery, soldier and politician (d. 1785)
July 21 (hanged) - Walter Kennedy, pirate (b. c.1695)
September 20 - Thomas Doggett, actor and benefactor (b. c.1670)
Autumn - Godfrey Boate, judge (b. 1673)
Denis Daly, judge (b. c.1638)
Sir John Kirwan, merchant (b. 1650)
1721 in Ireland Wikipedia
Events from the year 1721 in Ireland.