Notes |
- Frederick married c. 1210 Sophie of Limburg, a daughter of Waleran III, Duke of Limburg and Cunigunde of Lorraine. They had issue:
Dietrich I (born before 1215, died 1301), last Count of Isenberg and Altena, 1st Count of Limburg (a.d.Lenne)
Friedrich of Altena (born before 1220, died after 1243)
Elisabeth of Altena (born before 1220, died after 1275), married ca. 1234 Dietrich II Count of Mors (born 1226, died 1275)
Sophie of Altena (born before 1222, died after 1292), married in 1237 Heinrich III von Volmestein
Agnes of Altena (born before 1228, died after 1282), married in 1243 Burchard III von Broich. They had 13 children
a daughter, married Johann I Count of Sponheim and Sayn.
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