Background
He was the second son of Baldwin V, Count of Hainault, and Margaret I, Countess of Flanders.
He was the second son of Baldwin V, Count of Hainault, and Margaret I, Countess of Flanders.
Baldwin"s will left Namur to Philip, but as a fief of Hainault. However, Theobald I of Bar, who had married Henry of Luxembourg"s heiress, Ermesinda, refused to relinquish Namur and attacked Philip. The war lasted for three years until the Treaty of Dinant, signed on 26 July 1199, recognised Philip as holder of Namur.
This insulted the barons of Flanders and Hainault and they revolted and forced him to give up the regency.
In Namur, Philip reigned as a peaceful and pious promoter of social development. He intervened as the mediator between many feuding lords.
He died of dysentery on 9 October 1212, in Valenciennes.