Hubert William Ponsonby 5th. Baron de Mauley
- Born: 21 Jul 1878, Kirkstall, YKS
- Christened: 17 Aug 1878, Kirkstall, YKS
- Marriage: Elgiva Margaret Dundas on 11 Oct 1920 in St. Peter's, Pimlico, MDX
- Died: 13 Sep 1962, Witney District, OXF
Noted events in his life were:
• Education, 1892-1894, Charterhouse School, LON.
• Occupation: Land Agent, 1901, Geddington, NTH.
• Military: Captain, Gloucestershire Yeomanry.
• Military Award: Victory Medal.
• Military Award: British Medal.
Hubert married Elgiva Margaret Dundas, daughter of Hon. Cospatrick Thomas Dundas and Unknown, on 11 Oct 1920 in St. Peter's, Pimlico, MDX. (Elgiva Margaret Dundas was born on 9 Nov 1897 and died in Jan 1987 in Oxford District, OXF.)