From 1316, he acted as regent in the county, imprisoned his father in 1318, and governed as "son of the Count".

[1] He remained Edward's closest ally among the German princes in the first phase of the Hundred Years War.

[2] Reginald's first marriage (Roermond, 11 January 1311) was to Sophia Berthout (died 1329),[3] Lady of Mechelen.

Their children were: Widowed, Reginald married, at Nijmegen, May 1332, Eleanor of Woodstock (1318–1355),[3] daughter of Edward II of England.

Their children were: He excluded Eleanor from court in 1338, claiming she had leprosy,[a] she later became a nun after his death.