Helladius

Helladius may refer to:

• Alexander Helladius (1686-?), Greek scholar and humanist; studied at the Greek College of Oxford University and published works on Greek language and tradition
• Helladius of Kiev, Ukrainian monk and saint
• Helladius of Auxerre, Christian bishop and saint (died 387)
• Helladius of Caesarea, Christian bishop; he was named by an edict of Theodosius I (30 July 381) to an episcopal see named as a centre of Catholic communion in the East
• Helladius of Ptolemais, Christian bishop; he was present at the First Council of Ephesus (431)
• Helladius of Tarsus, Christian bishop; he was condemned at the First Council of Ephesus (431) and appealed to the pope in 433
• Helladius of Toledo, Christian bishop and saint, died 633
• Helladius and Theophilus, two Christian martyrs in Libya, feast day 8 January
• Helladius, Crescentius, Paul and Dioscorides, Christian martyrs, feast day 28 May

It is also known in the Italian variant Elladio and the Spanish variant Eladio.