The hydronym Laaber is the name of several rivers in the Lower Bavaria and Upper Palatinate regions of Germany. Its origin, however, has so far not been satisfactorily explained. In this article, suggestions to date concerning the etymology of the name are critically reviewed, and a new etymology is advanced. The name is derived from the PIE root *leh2p- ‘to shine, be bright’ and explained as an original adjectival formation in *-ro-. This is satisfactory not just from a formal point of view but would also permit to compare this hydronym to the numerous river names derived from the Late PIE roots *arg- and *alb- ‘to shine’ from a semantic point of view.
© 2016 by Walter de Gruyter Berlin/Boston