Prince Ioannis Doukas of Byzantine 
Ioannis was born about 1012 in Constantinople, Constantinople, Turkey. Ioannis' father was Duke Andronikos Doukas of Byzantine. His paternal grandfather was Gregoras von Stoln. He was an only child. He died about 1088.
They had a son named Andronikos.
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Children
Emperor Andronikos Doukas of Byzantium
Andronikos was born before 1045 in Constantinople, Constantinople, Turkey. He died on October 14th, 1077.
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