Hardouin VI De+ Mailly 
General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: L.B. de Rouge, Reynaud de Paysac, H.R. Moser <Burke Peerage>), O.Guionneau, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, and E. Lodge>)
They have a son named Hardouin V De+.