Reginald I
In 1249, Adolf was betrothed to Elisabeth of Guelders, daughter of Otto II, Count of Guelders and half-sister of Reginald I, his rival to the Duchy of Limburg. Elisabeth died 31 March 1315 and is buried with her husband in the Church of Solingen-Gräfrath. As Adolf and Elisabeth had no issue, Adolf's brother William I of Berg succeeded him as Count of Berg.