Waningus (also Vaneng) (born in Rouen, died c. 683) was a Merovingian count and royal official under Clotaire III.
Born in Rouen, Waningus was governor of the Pays de Caux in Neustria.
Around 648, he withdrew from court to assist Wandrille in founding Fontenelle Abbey, helping to endow it.
Around 675, the blinded bishop Leodegar was sent to Fecamp, where the nuns tended him with care, until in October 678 he was removed at the instance of the Mayor of the palace, Ebroin, and murdered.
[3] Waningus's relics were moved from Fecamp to the Augustinian house at Ham in the ninth century.