Gelasius
Gelasius is a masculine given name, from Greek Γελάσιος, from Ancient Greek γέλασις. It may refer to:
- Gelasius of Caesarea, bishop of Caesarea
- Pope Gelasius I
- Gelasius of Nilopolis, Egyptian Christian abbot
- Gelasius of Cyzicus, ecclesiastical writer
- Pope Gelasius II
- Gelasius, Archbishop of Armagh
- Gelasius Ó Cuileanáin, Cistercian Abbot of Boyle, Ireland
- Nikollë Gazulli, who wrote under the pseudonym Gelasius