Nothing certain is known of Ulpia Severina before her marriage to Aurelian. It has been suggested that she was the daughter of Ulpius Crinitus, a figure appearing in the Historia Augusta. This Ulpius is said to have been a descendant of the line of Trajan and to have supported and adopted Aurelian. However, the Historia Augusta is notoriously unreliable, and the story, and perhaps Ulpius himself, may have been invented by propagandists trying to connect Aurelian with the "Good Emperor" Trajan. Some scholars believe that Ulpia Severina was from Dacia, where the nomen Ulpius was common due to the influence of Trajan (Marcus Ulpius Traianus).