The names Varni (Procopius), Varini (Tacitus), Varinnae (Pliny the Elder), Wærne/Werne (Widsith) and Warnii (Lex Thuringorum) probably refer to a little-known Germanic tribe.
The name would have meant the "defenders".
They live n northern Germany.
They are often called Warni and Warini in English.