Crispus in Wikipedia

Flavius Julius Crispus, also known as Flavius Claudius Crispus and Flavius Valerius Crispus was a Caesar of the Roman Empire. He was the first-born son of Constantine I and Minervina. Crispus' year and place of birth are uncertain. He is considered likely to have been born between 299 and 305, somewhere in the Eastern Roman Empire. His mother Minervina was either a concubine or a first wife to Constantine. Nothing else is known about Minervina. His father served as a hostage in the court of Eastern Roman Emperor Diocletian in Nicomedia. Thus securing the loyalty of Caesar of the Western Roman Empire Constantius Chlorus, father of Constantine and grandfather of Crispus. In 307, Constantine allied to the Italian Augusti, and this alliance was sealed with the marriage of Constantine to Fausta, daughter of Maximian and sister of Maxentius. The marriage of Constantine to Fausta has caused modern historians to question the status of his relation to Minervina and Crispus. If Minervina was his legitimate wife, Constantine would have needed to secure a divorce before marrying Fausta. This would have required an official written order signed by Constantine himself, but no such order is mentioned by contemporary sources...