Athanasian (adj.)

1580s, "pertaining to Athanasius" (c. 296-373), bishop of Alexandria in the reign of Constantine. The name is Latin, from Greek Athanasios, from athanatos "immortal," from a- "not, without" (see a- (3)) + thanatos "death" (see thanatology). The anti-Arian creed attributed to him was perhaps not his work.