Duke of Leinster - Dukes of Leinster, Second Creation (1766)

Dukes of Leinster, Second Creation (1766)

Other titles: Marquesse of Kildare (1761), Earl of Kildare (1316), Earl of Offaly (1761), Viscount Leinster, of Taplow in the County of Buckingham (GB 1747) and Lord of Offaly (c. 1193–?)

• James FitzGerald, 1st Duke of Leinster (1722–1773), elder son of the 19th Earl
• William FitzGerald, 2nd Duke of Leinster (1749–1804), second son of the 1st Duke
  • George FitzGerald, Marquess of Kildare (1783–1784), eldest son of the 2nd Duke, died in infancy
• Augustus FitzGerald, 3rd Duke of Leinster (1791–1874), second son of the 2nd Duke

Other titles (4th Duke onwards): Baron Kildare (UK 1870)

• Charles FitzGerald, 4th Duke of Leinster (1819–1887), eldest son of the 3rd Duke
• Gerald FitzGerald, 5th Duke of Leinster (1851–1893), eldest son of the 4th Duke
• Maurice FitzGerald, 6th Duke of Leinster (1887–1922), eldest son of the 5th Duke, died unmarried
• Edward FitzGerald, 7th Duke of Leinster (1892–1976), third and youngest son of the 5th Duke
• Gerald FitzGerald, 8th Duke of Leinster (1914–2004), only legitimate son of the 7th Duke
• Maurice FitzGerald, 9th Duke of Leinster (b. 1948), elder son of the 8th Duke
  • Thomas FitzGerald, Earl of Offaly (1974–1997), only son of the 9th Duke, died unmarried in a road traffic collision

The heir presumptive is the 8th Duke's younger son Lord John FitzGerald (b. 1952)