A baptismal name for a boy
Eustachius
One saint bore this name
Saints named Eustachius
Questions
The name day of Eustachius is October 12, the feast of Confessor Eustachius of Syria.
The Sinaxarion archive holds 1 saints named Eustachius, with their lives and icons.
Yes. Eustachius is the name of a saint of the Orthodox Church, so the child will have Confessor Eustachius of Syria as patron.