 William John Gore, second son of Arthur Gore, 2nd Earl of Arran, and his wife Caroline, daughter of Sir Thomas Hales, 4th Baronet.In 1820 Gore was sent as attaché to the British embassy in Stockholm, was transferred to Paris in 1825 and to Lisbon a year later.In 1828 he was promoted to secretary of legation in Buenos Aires where he was "chargé d'affaires" 1832–34.