Venerable Leontius, the young canonarch of the Kiev Caves Lavra.
Saint Leontius served as canonarch, the leader of the chanting, at the Kiev Caves Lavra while still very young, in the fourteenth century. He died in youth, and his relics rest in the Far Caves of the Lavra.
Feast day
On the New Calendar, Leontius the Canonarch of the Kiev Caves is commemorated on June 18. Churches on the Old (Julian) Calendar keep the feast on July 1 of the civil calendar.
Also commemorated on June 18

Leontius the Athonite, Myrrh-gusher
Venerable, Λεόντιος ο Αθωνίτης ο Μυροβλήτης
Venerable Leontius the Myrrh-gusher of Dionysiou Monastery on Mount Athos.