Wilhelm was the son of Gerhard von Loon-Rieneck and Adélaïde de Gueldre. The date and place of his birth have not been found.
He died in 1206 in Rousion, en Thrace.
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Wilhelm von Loos |
Gerhard von Loon-Rieneck |
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Adélaïde de Gueldre |
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| Event | Date | Details | Source | Multimedia | Notes | ||
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| Death | 1206 |
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