Lopsi is the name of a Liburnian[1][2] tribe inhabiting the mountains along the eastern coast of the Adriatic before and during the Roman Empire, specifically present-day Velebit[3]. The tribe was mentioned by Pliny the Elder in his Naturalis Historia[4], and it borrowed its name to one of the Roman cities on the coast, Lopsica (present day Sveti Juraj in Croatia). The name has survived to present day as a place name, as well as the family surname Lopac.