The Barony of Dunsany was created by writ of summons in the Peerage of Ireland in 1439. In 1461, the peerage was confirmed by letters patent. The peerage is still extant. It should be noted that the title is listed by "Burke's Peerage and Baronetage" and "The Complete Peerage" as Baron of Dunsany and not as Baron Dunsany. In normal parlance the Baron of Dunsany is referred to as Lord Dunsany. The Peerage of Ireland is the term used for those peers created by British monarchs in their capacity as Lord or King of Ireland. ...
One of Lord Dunsany's ancestors was the Roman Catholic Saint Oliver Plunkett[?], the martyred Archbishop of Armagh.
The Countess of Fingall, wife of Dunsany's cousin, the Earl of Fingall[?], wrote a best-selling account of the life of the aristrocracy in Ireland in the late nineteenth century and early twentieth century, called Seventy Years Young.
H.P. Lovecraft was greatly impressed by Dunsany after seeing him on a speaking tour of the United States, and Lovecraft's early stories clearly show his influence.