Charlotte Porcher, née Burnaby, was the second daughter of Admiral Sir William Burnaby, Bt. She married Josias Dupre Porcher at St Mary's Fort St George, Madras, on 1 November 1787. Josias Dupre Porcher was Mayor of Madras and Military Store Keeper in 1792. Their three children Thomas, George and Henry were all baptised at St Mary's Fort St George. The family returned to England in 1800 when Josias retired. He later became M. P. for Bodmin, Bletchingley and Dundalk.
Charlotte Porcher was painted twice by Smart: in 1788, and one year earlier in 1787, at the same time as her husband (Christie's, London, 14 February 1945, lot 79 and later Sotheby's, London 15 June 1950, lot 17). Portraits by Smart of her two sisters were sold Christie's, London, 24 May 2004, lots 130 and 131, and one was sold again in November 2012.