[2] 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).

[6] 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.

The Austrian statesman and soldier Laval Graf Nugent von Westmeath also belonged to this family.