Lady Chatterton was the only child of the Rev. Lascelles Iremonger, prebendary of Winchester Cathedral, who died on 6 January 1830, by his second marriage, on 26 October 1799, with Harriett, youngest sister of Admiral Lord Gambier. She was born at 24 Arlington Street, Piccadilly, London, on 11 November 1806. On 3 August 1824 she married Sir William Abraham Chatterton of Castle Mahon, County Cork, bart. She died at Malvern Wells on 6 February 1876.