[9] John's mother was the eldest daughter of William Burke, 7th Earl of Clanricarde and widow of Bryan Magennis, 5th Viscount of Iveagh.
[13] However, in 1791, it would be found that the title of "Earl of Ormond" (and its subsidiary titles) in the peerage of Ireland had merely lain dormant and so could be successfully revived by John Butler's cousin, John Butler, 17th Earl of Ormonde.
With the permission of the Parliament of Great Britain in passing the Crown Lands (Forfeited Estates) Act 1720 (7 Geo.
The estate passed to his unmarried sister Lady Amelia Butler, who held it for about two years.
[21] He was succeeded by his cousin Walter, the son of his uncle John,[21] who unknowingly became de jure the 16th Earl of Ormond.