Isenberg
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Isenberg was a County of medieval Germany. It was a partition of the County of Altena, and was annexed to Limburg-Isenberg in 1242.
[edit] Counts of Isenberg (1191 - 1242)
- Eberhard II of Altena, count of Altena and Isenberg (born 1180, died 1209)
- Frederick II of Isenberg, count of Altena and Isenberg (1209 - 1226)
- Theodoric I, count of Altena and Limburg-Isenberg (1226 - 1242)