i know it's not as glamorous as descending from sea monsters, trojans or jesus, but ptolemy is very clear that there was a tribe of south (west) germans called the marvingi that lived near the confluence of the rhine and the main, pretty much perfectly positioning them to jump the river with the rest of the franks. remember that frank is an inexact ethnic term that translates to "free" (meaning not roman) and refers to a coalition of german, celtic, slavic, iranian and other peoples rather than a specific german tribe. ptolemy may have mistaken germans for celts - he wouldn't be the first southern geographer to do so. further, the connection is vague; as i'm presenting it to you right now, it's not in any better shape than the cimmerian suggestion (cimmerian looks like cimbri looks like sicambri). so, i'm not suggesting that ptolemy's map proves that the merovingians were of the marvingi tribe. yet, the geographic and chronological positioning - combined with the very down to earth nature of the idea - is quite enticing. it's something i'd like to present is an idea that requires further research. specifically: can we trace the merovingians to the confluence of the main and the rhine? because, if we can, ptolemy has a very simple and rational answer for us.

(http://en.wikipedia.org/wiki/Talk:Merovingian_dynasty#ptolemy)