Magna Charta Sureties gives Isabel's birth date as 1233/5. Since herhusband William Daubigny died in 1242, any offspring would have beenconceived while Isabel was only 7 to 9 years old. Coincidentally theirdaughter Isabel is listed in rootsweb as being born in 1233. I thinkthat Magna Charta Sureties is confusing the dates of the daughter andmother.