Helladius

Helladius may refer to:

• Alexander Helladius (1686–?), Greek scholar and humanist
• Helladius (4th century hieromartyr)
• Helladius of Kiev, Ukrainian monk and saint
• Helladius of Auxerre (died 387), Christian bishop and saint
• Helladius of Caesarea, Christian bishop, named by an edict of Theodosius I (30 July 381) to an episcopal see
• Helladius (grammarian), grammarian, professor, and a priest of Zeus
• Helladius of Ptolemais, Christian bishop, present at the First Council of Ephesus (431)
• Helladius of Tarsus, Christian bishop, condemned at the First Council of Ephesus (431)
• Helladius of Toledo (died 633), Christian bishop and saint
• Helladius and Theophilus, two Christian martyrs in Libya, feast day 8 January
• Helladius, Crescentius, Paul and Dioscorides, Christian martyrs, feast day 28 May