Werner (Garnier, Warin) (died 973), Count of Valenciennes and Count of Hesbaye and Zülpich, brother of Renaud, Count of Mons. His parentage is unknown.
In 953, Reginar III was defeated by King Lothair and Archbishop Bruno, and banished to Bavaria. At that time, Werner became the successor of Rudolf as Count of Hesbaye, Werner, is referred to as count in a charter confirmed by Bruno. In 966, Rudolf's property was confiscated and turned over to Werner.
After the disgrace of Count Reginar III, Godfrey I, Duke of Lower Lorraine, received the County of Hainaut, which included the cities of Mons and Valenciennes. After the death of Godfrey, Amaury became Count of Valenciennes, while Richer assumed the countship of Mons. After the death of Amaury, Emperor Otto I appointed Werner as the Count of Valenciennes.
Returning from exile in 973, the sons of Reginar III, Reginar IV, Count of Mons, and Lambert I, Count of Louvain, killed both Werner and his brother Renaud at the battle of Peronne.
Werner had no known children. After his death, Folcuin (possibly related to Hieronymus, illegitimate son of Charles Martel) became Count of Hesbaye. Reginar IV succeeded Werner as Count of Valenciennes.