Philip I (1175 – 9 October 1212), called the Noble, was the margrave of Namur from 1195 until his death.
Baldwin V had fought a war with his uncle Count Henry IV of Luxembourg to establish Namur as independent from Luxembourg in 1190 and in 1194, Emperor Henry VI declared Namur to be a margraviate.
[2] The war lasted for three years until the Treaty of Dinant, signed on 26 July 1199, recognised Philip as holder of Namur.
[2] Philip was left as regent of Hainault while his elder brother, Count Baldwin IX of Flanders, went on the Fourth Crusade and acted as guardian to Baldwin's daughters, Joanna and Margaret.
[4] In Namur, Philip reigned as a peaceful and pious promoter of social development.