He was first associated with his father in 1136, when he first carried the ducal title. This was confirmed by Conrad III of Germany, who had married the sister of Godfrey's wife. Waleran left a son, Henry II of Limburg, who asserted his father's ducal rights. Godfrey and Henry entered into a war in which the latter was decisively and quickly destroyed. Godfrey did not long enjoy his victory. He was killed by a disease of the liver two years thence. He was buried in St. Peter's Church in Leuven.