Lopsi is the name of a Liburnian tribe inhabiting the mountains along the eastern coast of the Adriatic before and during the Roman Empire

Roman Empire

The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

, specifically present-day Velebit

Velebit

Velebit is the largest though not the highest mountain range in Croatia. Its highest peak is the Vaganski vrh at 1757 m.The range forms a part of the Dinaric Alps and is located along the Adriatic coast, separating it from Lika in the interior...

. The tribe was mentioned by Pliny the Elder

Pliny the Elder

Gaius Plinius Secundus , better known as Pliny the Elder, was a Roman author, naturalist, and natural philosopher, as well as naval and army commander of the early Roman Empire, and personal friend of the emperor Vespasian...

 in his Naturalis Historia, and it borrowed its name to one of the Roman cities on the coast, Lopsica (present day Sveti Juraj in Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

). The name has survived to present day as a place name, as well as the family surname Lopac.