Kammala jumla mai zuwa: Heinsberg ɗan John II na Loon ne da matarsa ta farko, Margaret na Gennep. Lokacin da Yarima-Bishop John na Walenrode ya mutu ba zato ba tsammani a cikin 1419, Heinsberg, duk da ƙuruciyarsa, an zaɓe shi gaba ɗaya a matsayin magajinsa cikin makonni uku. An naɗa shi firist a jajibirin Kirsimeti na 1419, an naɗa shi a matsayin bishop a cikin Lent 1420, kuma an ba shi iko na duniya a matsayin sarki-bishop, a madadin Sigismund, Sarkin Roma Mai Tsarki, a Frankfurt a ranar 21 ga Yuni 1420. A cikin 1422 ya shiga cikin
Yaƙin Crusade na Bohemia da Hussites. A shekara ta 1424 ya gyara hanyar da ake zaɓan 'yan majalisa, ya ba da dokoki da suka ci gaba da aiki har zuwa shekara ta 1684.