_____________________
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                           ________________________|
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 _John of GREY ___________|
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|                         |                         _____________________
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|--John GREY 
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|                          _William of ODINGSELLS _|
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|_Margaret of ODINGSELLS _|
                          |
                          |                         _Walter FITZROBERT __+
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                          |_Ela FITZWALTER ________|
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                                                   |_Ida LONGESPEE ______