Quick answer
Theophanes is a boy name meaning "manifestation of God".
Meaning and history
The name means "manifestation of God" from Greek θεός ( theos ) meaning "god" and φανής ( phanes ) meaning "appearing". This name was borne by a few saints, including an 8th-century chronicler from Constantinople and a 19th-century Russian Orthodox saint, Theophanes the Recluse, who is Феофан (Feofan) in Russian. Another famous bearer was a 14th-century Byzantine icon painter active in Moscow.
Notes and context
Usage: ancient greek | Ancient Greek: Θεοφάνης