Konstantinos was the son of Ivan III Asên and Eirene Palaiologina. The date and place of his birth have not been found.
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Ivan III Asên |
Iwan Milo |
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Michaél VIII Dukas Komnenos Palaiologos |
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Theodora Angelina Palaiologina |
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Theodora Dukaina Batatzaina |
Ioannes Batatzes |
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Eudokia Komnaina Angelina |