Simon Mark Noel Ponsonby, who died 14 February, 2012, aged 50, was distantly related to the Earls of Bessborough. He was born in 1961, the son of Commander Francis Ponsonby, LVO, OBE, RN (1932-2003) by his former wife the former Sally Cocup.
Simon's paternal grandfather was Gilbert Jocelyn Ponsonby (b 4 May 1904), who was a son of the Rev. Stewart Gordon Ponsonby (1856-1938), who married in 1889, Mary Catherine Buxton (1870-1960), dau of Sir Thomas Fowell Buxton, 3rd Baronet (1837-1915), by his wife the former Lady Victoria Noel, daughter of the 1st Earl of Gainsborough, &c.
The Ponsonby line here stems from John Ponsonby, a brother of William 1st Baron Bessborough.