Gennep

Etymology

 * (Limburg) First attested as in pago Ganipi in 949. Derived from a hydronym analysable as a compound of and  suffixed with the locational suffix . Compare  and.
 * (Noord-Brabant) First attested as in ghennepe in 1249. Derived from a hydronym analysable as a compound of and  suffixed with the locational suffix . Compare  and.

Etymology
(see there for more).