Dietrich was the son of Willem VI van Horne and Isabella Mechtild van Arkel. The date and place of his birth have not been found.
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Willem VI van Horne |
Willem V van Horne |
Gerard I van Horne |
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Johanna van Leuven-Gaasbeek |
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Elisabeth van Kleef |
Dirk II Loef van Kleef |
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Mechtild van Voorne |
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Isabella Mechtild van Arkel |
Jan IV van Arkel |
Jan III Herbaren |
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Mabelia van Voorne |
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Ermgard van Kleef |
Otto I van Kleef |
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