Guillaume de Bethune I & Clemence d' Oisy 
Guillaume and Clemence were married in 1129.1 They had a son and a daughter, named Robert and Mathilde.
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Personal Details
Guillaume de Bethune I
Guillaume was born in 1100 in Bethune, Artois/Pas-de-Calais, France.1 He died at the age of 38 in 1138.1
Clemence d' Oisy
Clemence was born in 1102 in Cambray, Nord-Pas-de-Calais, France.1 She died at the age of 63 in 1165.1
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Children
Robert de Bethune V
Robert was born in 1130 in Bethune, Artois/Pas-de-Calais, France.2 He died as a war casualty, Battle of Acre, at the age of 61 on January 10th, 1191 in Acre, Palestine.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=:3253225&id=I15853&style=TABLE
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=:3253225&id=I15865
3 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=:3253225&id=I15871
2 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=PED&db=:3253225&id=I15865
3 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=:3253225&id=I15871