Claudius Ptolemy in his "Geographia" (2.10), appears to describe a north to south series starting with the Chamavi "under" whom are the Chatti and Tubanti, and then between these and the Sudetes mountains, thought to be the Erzgebirge, the Teuriochaemae (an otherwise unknown name, but in the place previously inhabited by the Hermanduri and later by the Thuringii, with these three names often thought to be equivalent). But the position of the Chamavi and Tubantes so far to the southeast does not match other sources, and Chamavi also seem to be mentioned under another name in a more expected place, south of the coastal Chauci, and north of the Bructeri, in between Ems and Weser. Confusingly, other tribes normally from the region of the Tubantes, the Chattuari and Chasuarii, are also described as if they are in southern Germany in this passage.