(Ἡγησιπύλη), daughter of Olorus, king of Thrace, and wife of Miltiades. A son of hers, named Olorus, after his grandfather, was the father of Thucydides the historian. In all probability, he was the fruit of a second marriage contracted by Hegesipyla after the death of Miltiades. (Hdt. 6.39; Marcellin. Vit. Thuc.)
[E.E]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890