Guillaume IV De Flandres Seigneur de Crèvecoeur
| Birth* | Guillaume IV De Flandres Seigneur de Crèvecoeur was born at France. |
| Marriage* | He married Alix De Clermont Vicomtesse de Châteaudun, daughter of Raoul II De Clermont Seigneur de Neelle and Alix De Dreux Vicomtesse de Châteaudun, in 1286 at France. |
| Death* | Guillaume IV De Flandres Seigneur de Crèvecoeur died in 1312 at France. |
| Occupation* | He was employed Siegneur de Crèvecoeur and de Tenremonde. |
| Name Variation | Guillaume IV De Flandres Seigneur de Crèvecoeur was also known as Dampierre. |
| Name Variation | Guillaume IV De Flandres Seigneur de Crèvecoeur was also known as Lackland. |
Family | Alix De Clermont Vicomtesse de Châteaudun |
| Child |