The Marquess of Waterford is the senior marquess in the Peerage of Ireland. The title was created in 1789 for the Earl of Tyrone.
The Marquess holds the subsidiary titles of Earl of Tyrone (1746), Viscount Tyrone (1720), Baron Tyrone (1786), Baron La Poer (1375), and Baron Beresford (1720). All but the Barony of Tyrone are in the Peerage of Ireland. The Marquess is also an Irish baronet. Prior to 1999, the Marquess sat in the House of Lords as Baron Tyrone in the Peerage of Great Britain.
TYRONE The earldom of Tyrone was first conferred by Henry VIII.
Descendants of the 1st earl in Spain continued to style themselves earls of Tyrone till the death early in the 18th century of Owen O'Neill, grandson of Owen Roe O'Neill.
In 1673 Richard Power, 6th Baron Le Power and Coroghmore, governor of Waterford, was created viscount of Decies and earl of Tyrone, being succeeded in these titles by his two sons successively, on the death of the younger of whom in 1704 they became extinct.