Guillaume I de Coucy | |
|---|---|
 Arms of Guillaume de Coucy: Barry of six, vair and gules | |
| Born | c. 1288 |
| Died | 1335 (aged 46–47) |
Sir Guillaume I de Coucy[a] (died 1335), Lord of Coucy, Oisy, La Fère, Marle and Montmirail.
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