Marcus Aurelius Valerius Maximianus (Maximian) was a Western Roman Emperor and the father of Maxentius. He was co-emperor with Diocletian from 286 to 305 and retired, but came out of retirement to help his son defeat Severus and Galerius. The boy won over Constantine, so Maximian gave him his daughter Fausta in marriage, but then Maximian and Maxentius became enemies. Maximian abdicated, and fled to Constantine, but couldn't deal with it, so he committed suicide in 310.