Saint Eleutherius of Tournai (French: Eleuthère) (+ c. 532) is venerated as a saint and considered the first bishop of Tournai. There is very little known about St. Eleutherius was, without doubt, the first Bishop of Tournai. He became a bishop in 486. A group of Arians enraged by his preaching beat him severely He died some weeks later.
Tradition makes him a lifelong friend of St. Medardus, and the two saints had been courtiers before becoming bishops.
Eleutherius was probably named bishop of Tournai after St. Remigius organized the church hierarchy of northern Gaul at the end of the fifth century.