Frederick I, Count of Berg-Altena


Frederick I was a count of Berg-Altena, the later County of Mark.
Frederick was the son of Eberhard I, Count of Berg-Altena, and inherited the south-eastern territory of Altena. He married Alveradis von Krieckenbeck-Millendonk, daughter of Reiner von Krieckenbeck-Millendonk, and they had issue: