http://www.mathematical.com/mayenneclemence1167.html

Clemence of Mayenne born about 1167 Mayenne, France died about 1209

father: *Geoffroy II Seigneur De Mayenne born about 1142 Mayenne, France died 18 February 1168/69

mother: *Isabel De Mellento born about 1148 Meulan, Ile De France, France died 10 May 1220
married about 1166 Isle de France, France