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Male Juan Sednor De Marchena Click to view Juan Sednor De Marchena in the family tree

Juan Sednor was born about 1246.  Juan Sednor's father was Fernando III of Castile and his mother was Jeanne De Dammartin.  His paternal grandparents were Alfonso IX of Castile and Leon and Berengaria Alfonsez Sanchez of Castile; his maternal grandparents were Simon II De Dammartin and Marie De Ponthieu. He had a brother and a sister, named Luis or Leon and and Eleanor of.  He is the youngest of the three children. He had two half-brothers named Alfonso X of and Juan Manuel Fernandez of.

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