James FitzGerald, 1st Duke of Leinster

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Lieutenant-General His Grace The Duke of Leinster PC (Ire)
Portrait by Joshua Reynolds
Member of the House of Lords Lord Temporal
In office 1747 – 19 November 1773 Hereditary Peerage
Succeeded by	William FitzGerald, 2nd Duke of Leinster
Personal details
Born	(1722-05-29)29 May 1722
Died	19 November 1773(1773-11-19) (aged 51) Leinster House, Dublin
Spouse	Lady Emily Lennox ​ (m. 1747)​
Children	18, including: William FitzGerald, 2nd Duke of Leinster Charles FitzGerald, 1st Baron Lecale Charlotte Strutt, 1st Baroness Rayleigh Lord Henry FitzGerald Lord Edward FitzGerald
Parents	Robert FitzGerald, 19th Earl of Kildare Lady Mary O'Brien

Lieutenant-General James FitzGerald, 1st Duke of Leinster, PC (Ire) (29 May 1722 – 19 November 1773), styled Lord Offaly until 1743 and known as The Earl of Kildare between 1743 and 1761 and as The Marquess of Kildare between 1761 and 1766, was an Anglo-Irish nobleman, soldier and politician.