Frederick I, Count of Berg-Altena
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Frederick I (German: Friedrich I.; 1173 – 1198) 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:
- Adolf I of Altena (1194-1249);
- Friedrich of Altena (fl 1199).