Quick answer
Athanasius is a boy name with Greek roots meaning "immortal".
Pronunciation: English /ˌæθ.ə.ˈneɪ.ʃəs/.
Meaning and history
This name comes from the Greek name Ἀθανάσιος (Athanasios) meaning "immortal", from Greek ἀ ( a ), a negative prefix, combined with θάνατος ( thanatos ) meaning "death". Saint Athanasius was a 4th-century bishop of Alexandria who strongly opposed Arianism.
Notes and context
Usage: ancient greek | Ancient Greek: Ἀθανάσιος