Книга истории франков
An anonymous work of 727 called "Liber Historiae Francorum" states that following the fall of Troy, 12,000 Trojans led by chiefs Priam and Antenor moved to the Tanais (Don) river, settled in Pannonia near the Sea of Azov and founded a city called Sicambria. After altercations the Alans and Emperor Valentinian (the late 4th century AD), who renamed them Franks, they moved to the Rhine.