Early life and education
Castletown, baptised John Wilson, was born in London, the illegitimate son of John FitzPatrick, 2nd Earl of Upper Ossory and Elizabeth Wilson. He had a brother, Richard, who died young, and an elder sister, Emma Mary (died 25 September 1882), who married Robert Vernon Smith (later Lord Lyveden). After their father's death in 1818, they were raised at Ampthill Park under the guardianship of their cousin Henry Vassall-Fox, 3rd Baron Holland (1773–1840), who inherited Ampthill from the earl. They were also under the guardianship of their half-sisters, Lady Anne and Lady Gertrude Fitzpatrick. He was educated at Eton. He inherited parts of his father's estates in Ireland in 1823, when he reached the age of majority.Career
Wilson, who in 1842 assumed the surname of FitzPatrick by Royal Licence, was appointed High Sheriff of Queen's County in 1836. He was then elected to theFamily
Lord Castletown married Augusta Mary Douglas, daughter of Reverend Archibald Douglas, in 1830. They had one son and six daughters. * Hon. Bernard (1848–1937), succeeded as second baron *Hon. Gertrude (died 26 January 1912), married in 1862 Edward Randal Skeffington-Smyth *Hon. Augusta Frederica Anne (died 24 February 1903), married in 1861, Lt.-Col. Hon. Thomas Vesey Dawson, son of Lord Cremorne, killed in action at the Battle of Inkerman. She married secondly in 1856 Charles Magniac. *Hon. Florence Virginia Fox (died 5 March 1912), married in 1838 Gen. Sir George Higginson *Hon. Cecilia Emily Emma (died Oct/Nov 1918, buried Nov 8th 1918 at St.John's, Hove.), married in 1868 Hon. Lewis Strange Wingfield *Hon. Edith Susan Esther (died 1 December 1906), married in 1862, as his second wife, Sir Charles Murray *Hon. Olivia Douglas Amy (died 22 May 1893), married in 1869 Sir John Sebright, 9th Baronet He died in 1883, aged 71, just four months after the death of his only sister, Lady Lyvedon. Lady Castletown died in 1899. Lord Castletown was succeeded in the barony by his only son, Bernard, who died without heirs in 1937, at which time the barony became extinct.References
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