A baptismal name for a girl
Theonilla
One saint bore this name
Saints named Theonilla
Questions
The name day of Theonilla is October 29, the feast of Martyr Theonilla of Cilicia.
The Sinaxarion archive holds 1 saints named Theonilla, with their lives and icons.
Yes. Theonilla is the name of a saint of the Orthodox Church, so the child will have Martyr Theonilla of Cilicia as patron.