Herve III De Leon 
Herve III De was born about 1200. Herve III De's father was Herve II De Leon and his mother is Anne De Hennebont. His paternal grandfather was Herve I De Leon and his paternal grandmother is Marguerite De Rohan. He was an only child. He died in 1241.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, H.R. Moser <Burke Peerage>), O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, and E. Lodge> , Franck Veillon, B. Yeurc'h) http://www.geneastar.org.
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Ancestor Pedigree Chart
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*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)
- b.BET 1085 AND 1090 d.1157
- b.1100 d.1169
- b.1130 d.11 Sep 1179
- b.~ 1105
- b.~ 1168 d.1208
- b.~ 1062 in Penthievre, Bretagne, France d.BET 21 APR 1135 AND 1137 in Quire, St. Mary, Yorkshire, England
- b.~ 1106 d.1190
- b.~ 1067 in Guincamp, Bretagne, France
- b.> 1151 d.~ 1208
- b.1110 in Vendome, Loire-et-Cher, Orleanais/Centre, France d.1182 in La Charite-sur-Loire, Nievre, Bourgogne, France
- b.~ 1131
- b.1115
- b.~ 1183 d.23 Nov 1218
- b.< 1066
- b.~ 1085 d.1128
- b.~ 1066 d.1092
- b.~ 1110 d.1168
- b.~ 1085
- b.~ 1155
- b.~ 1130
- b.~ 1200 d.1241
- b.~ 1183
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They had a son named Herve IV De.