 This may be so, since between the 2nd and 4th centuries, the area around the present day German university town of Tübingen was settled by a Celtic tribe with Germanic tribal elements mixed in.The element tub- in Tübingen could possibly arise from a Celtic "dubo-", s.m., 'dark, black; sad; wild'.As found in the Anglo-Irish placenames of Dublin, Devlin, Dowling, Doolin and Ballindoolin.