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Books about Ingerina:
Eudocia Ingerina, the Normans, and the Macedonian dynasty (Zbornik radova VizantolosÌkog instituta. [Offprint... by Cyril A Mango (1973)
Wiki information Ingerina:
Eudokia Ingerina was the wife of the Byzantine emperor Basil I, the mistress of his predecessor Michael III, and the mother to both the Emperors Leo VI and Alexander and Patriarch Stephen I of Constantinople.
Alexander, sometimes numbered Alexander III, ruled as Emperor of the Byzantine Empire in 912–913. He was the third son of Emperor Basil I and Eudokia Ingerina. Unlike his older brother Leo VI the Wise, his paternity was not disputed between Basil I...