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Family Count of Hainault Jean de Avesnes of Flanders I & Countess Aleidis of Hainault Click to view Count of Hainault Jean de Avesnes of Flanders I & Countess Aleidis of Hainault in the family tree

Jean and Aleidis were married in September 1246 in Frankfort Am Main, Hessen-Nassau, Prussia.1   They had two sons named Jan and Guy.

1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I13560&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I4243&style=TABLE
3 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=bevangenealogy&id=I32745&style=TABLE
Further source/citation:
http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jdp-fam&id=I23050