Ulpii refers to a prominent family of Roman origin, known for producing several notable figures during the Roman Empire. The most famous member is Marcus Ulpius Trajanus, commonly known as Emperor Trajan, who ruled from 98 to 117 AD. Trajan is celebrated for his military conquests and extensive public building programs, which contributed to the prosperity of the empire. The Ulpii family is also associated with the city of Rome and its governance. Members of this family often held significant political and military positions, influencing the course of Roman history. Their legacy is reflected in various historical texts and archaeological findings from the period.