The Teutons are generally classified as a Germanic tribe. Some historians have suggested a Celtic origin for the Teutones. It has been suggested that their name is Celtic though this is controversial. Certain ancient writers classify the Teutones as Celts. This might be explained by the fact that writers of the time did not clearly distinguish between Celtic and Germanic peoples.
The early traveller of the 4th century BC, Pytheas, mentions the Teutones as inhabitants of the northern ocean coasts along with the Gutones. Strabo (64 or 63 BC – c. AD 24) and Marcus Velleius Paterculus (c. 19 BC – c. AD 31), moreover, classify them as Germanic peoples. According to a map by Ptolemy, they originally lived in Jutland, which is in agreement with Pomponius Mela, who placed them in Scandinavia (Codanonia) , implying that they may have originally inhabited both regions previously. The Danish district of Thy claims to be their homeland.