A baptismal name for a boy
Gymnasius
One saint bore this name
Saints named Gymnasius
Questions
The name day of Gymnasius is September 27, the feast of Martyr Gymnasius of Byzantium.
The Sinaxarion archive holds 1 saints named Gymnasius, with their lives and icons.
Yes. Gymnasius is the name of a saint of the Orthodox Church, so the child will have Martyr Gymnasius of Byzantium as patron.