Eustache I "A l’oeil", comte de Boulogne 1
 Research Notes:
According to Etienne Pattou, Eustache was probably the son of Baudouin, comte de Boulogne et de Thérouanne, and his wife Aleida (Adelvie) aka Alaïs de Gand. 1
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Comte de Boulogne. Malbodus, "abbatus" records donations to the abbey of Saint-Amand by charter dated to [1061] including "villam…Lurcium" held "ex comite Balduino" by "Eustachius comes et quidam miles Rainerus". It is possible, but not certain, that this charter refers to Eustache [I]. "Karolus…comes Flandrie" confirmed property of the abbey of Marchiennes at Lille by charter dated 1125 which names "comes Balduinus proavus meus…coniuge sua comitissa Adela, et…baronibus suis Eustachio…comite Bolonie, Rogero comite de Sancto Paulo", presumably referring to Baudouin V Count of Flanders and so dated to between 1035 and 1067, in which case the document could refer either to Eustache [I] or Eustache [II]. 2
Marriage Information:
Eustache married Mathilde de Louvain, daughter of Lambert I, comte de Louvain, and Gerberga Caroling of Lothringia (Lorraine). (Mathilde de Louvain was born est 995 in Louvain, Brabant.)
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