In 1761 Lord Kildare was created Marquess of Kildare and Earl of Offaly in the Peerage of Ireland, and in 1766 he was created Duke of Leinster, becoming by this time the Premier Duke, Marquess and Earl in the Peerage of Ireland.
Lord Kildare was created Marquess of Kildare and Earl of Offaly in the Peerage of Ireland. This was in 1761. He was created Duke of Leinster. This was in 1766. He was becoming by this time the Premier Duke, Marquess and Earl in the Peerage of Ireland. This was in 1766.