Eleutherius, Eleutherus or Eleuterus is a masculine given name which may refer to:
Saints Pope Eleutherius (died 189) Eleutherius of Nicomedia (died 303), Roman soldier who was martyred under Diocletian Eleutherius of Rocca d'Arce, 12th century English pilgrim Eleutherius of Tournai (died 532), bishop of Tournai, evangelist of the Franks Eleutherius and Antia, son (121–?) and mother martyrs the martyred companion of Saint Denis of Paris (died c. 250)
Patriarchs and exarchs Eleutherius of Byzantium, Patriarch of Constantinople (129–136) Eleutherius, Greek Patriarch of Antioch (1023–1028) Eleutherius, Greek Patriarch of Alexandria (1175–1180) Eleutherius (exarch) (died 620), Exarch of Ravenna
Bishops Eleutherius (died 676), Bishop of the West Saxons
Others Eleutherius Winance (1909–2009), Belgian-born Benedictine monk and philosophy professor
See also Saint Eleutherius (disambiguation) Eleutherios (disambiguation)