Earl of Kildare is an Irish peerage title. The tenth Earl was attained and his honours were forfeit in 1537. In 1554, the individual who would have been the earl but for the attainder was created Earl of Kildare; he was restored to the original earldom in 1569. The second earldom became extinct in 1599. The twentieth Earl was created Marquess of Kildare in 1761, and Duke of Leinster in 1766.
The tenth Earl was attained and his honours were forfeit in 1537.
In 1554, the individual who would have been the earl but for the attainder was created Earl of Kildare; he was restored to the original earldom in 1569.
Earl, however, is the oldest title and rank of English nobles, and was the highest until the year 1337, when the Black Prince was created duke of Cornwall by Edward III.
The fact that every earl was the earl of a particular county has been much obscured by the loose usage of early times, when the style adopted was sometimes that of the noble's surname (e.g.
From at least the time of the Conquest the earl had a double character; he was one of the "barons," or tenants in chief, in virtue of the fief he held of the crown, as well as an earl in virtue of his "belting" (with the sword) and his "third penny" of the county.