THESEUS.
He was Greek warrior who was known for many feats including the killing of the minotaur, a mythical monster. There are many accounts of how his marriage to Hippolyta came to be. The following sources might have influenced Shakespeare narration of the popular story.
Link 1: Plutarch's biographical narrations (https://www.gutenberg.org/cache/epub/14033/pg14033-images.html#LIFE_OF_PLUTARCH). During the Amazonian war, Hippolyta was influential in brokering, peace between the Athenians and her people. She was set to marry him but died on the battlefield.
Link 2: Shakespeare, William. A Midsummer Night's Dream: Texts and Contexts, edited by Gail Kern Paster and Skiles Howard, Bedford/St. Martins, 1999
Christine De Pizan (1405 - 1521), wrote a popular text about how women should conduct themselves. She also wrote on the relationship between Theseus and Hippolyta. In her version, Theseus ambushed the Amazonians because they were afraid of their influence. On the battle field, Theseus saw Hippolyta and kidnapped her. In order to bring peace, the queen, Orythia, allowed Theseus to marry Hippolyta.