A baptismal name for a boy
Thaddaeus
One saint bore this name
Saints named Thaddaeus
Questions
The name day of Thaddaeus is November 22, the feast of Martyr Thaddaeus.
The Sinaxarion archive holds 1 saints named Thaddaeus, with their lives and icons.
Yes. Thaddaeus is the name of a saint of the Orthodox Church, so the child will have Martyr Thaddaeus as patron.