The O'Reilly, later Nugent baronetcy, of Ballinlough in the County of Westmeath, was created in the Baronetage of Ireland on 23 July 1795 for Hugh O'Reilly. In 1812, on the death of his maternal uncle John Nugent, he assumed by Royal licence the surname of Nugent.[1] The third Baronet was Chamberlain to the Emperor of Austria and was also created a Count of the Austrian Empire. The family seat is Ballinlough Castle, Clonmellon, County Westmeath.
The heir presumptive is the present holder's first cousin Charles Rupert Nugent (born 1962).
The 1st Baronet's younger brother Andrew O'Reilly was a General der Kavallerie in the Austrian Army and a Graf (Count) of the Austrian Empire. Their sister Margaret married Richard Talbot and was, as a widow, created Baroness Talbot of Malahide in 1831. The Austrian statesman and soldier Laval Graf Nugent von Westmeath also belonged to this family.