 On 22 January 1775 he married Elizabeth Pollock (died 1778), and together they had one daughter, Louisa Mary Napier (died 1856) and one son, Henry Napier, born 1778.On 27 August 1781 he married Lady Sarah Lennox, daughter of Charles Lennox, 2nd Duke of Richmond.He was described at the time as being “impoverished”.