The Kyll, noted by the Roman poet Ausonius as Celbis, is a 128 km river in western Germany (North Rhine-Westphalia and Rhineland-Palatinate), left tributary of the Moselle. It rises in the Eifel mountains, near the border with Belgium and flows generally south through the towns Stadtkyll, Gerolstein, Kyllburg and east of Bitburg. It flows into the Moselle in Ehrang, a suburb of Trier.

In Fiction

The river Kyll, personified as a woman named Kelly, is one of the central characters in the fantasy/crime novel "October Man", written by the author Ben Aaronovitch, in the book series Rivers of London.