 A great-uncle Samuel Helbert Israel Ellis was a surgeon at the London Hospital c.1802 and treasurer of the Great Synagogue, Duke's Place, London.Samuel's son was Sir Barrow Helbert Ellis, K.C.S.I., HEICS (1823–1887), (see ODNB).Meanwhile, Helbert's brother Charles Helbert Helbert (d.1903) married Evelyn Mary Kennedy, granddaughter of Earl of Cassillis and Viscount Dungarvan and great-granddaughter of Earl of Howth.