What is "vedast"

''For the abbey, please see Abbey of St. Vaast

Saint Vedast or Vedastus, also known as Saint Vaast (in Flemish, Norman, and Picard) or Saint Waast (also in Picard and Walloon) and Saint Gaston in French, (died c. 540) was an early bishop in the Frankish realm.

At the beginning of the sixth century Saint Remigius, bishop of Reims, profited by the good will of the Frankish monarchy to organize the Catholic hierarchy in the north of Gaul. He entrusted the diocese of Arras and diocese of Cambrai to Vedast, who was the teacher of Clovis after the victory of Tolbiac, and helped with the conversion of the Frankish king.