_Fastre II of OISY ___+
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                           _Walter of OISY _____|
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                          |                     |_Richlide of UNKNOWN _
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 _Nicholas of OISY _______|
| (1130 - 1170)           |
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|                         |_Ida of MORTAGNE ____|
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|--James of AVESNES 
|  (1152 - 1191)
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|_Matilda of DE LA ROCHE _|
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