https://en.wikipedia.org/wiki/Justinian_I
Justinian was born in Tauresium, Dardania, around 482. A native speaker of Latin (possibly the last Roman emperor to be one), he came from a peasant family believed to have been of Illyro-Roman or of Thraco-Roman origin. The cognomen Iustinianus, which he took later, is indicative of adoption by his uncle Justin. During his reign, he founded Justiniana Prima not far from his …