Athanasios as a Baby Name. Meaning and Origin of Athanasios

What is the meaning of the name Athanasios ?

The baby name Athanasios is a Male name , 5 syllables long and is pronounced Modern Greek IPA: /a.θaˈna.si.os/; English approximation: ah-thah-NAH-see-os.

Athanasios is Greek in Origin.

Athanasios (Greek Ἀθανάσιος) comes from the elements a- “not” and thánatos “death,” giving the meaning “immortal,” “deathless,” or “undying.” The name acquired strong Christian resonance as a statement of victory over death and enduring life.

It has deep roots in the Greek and wider Eastern Christian world, most notably through Saint Athanasius of Alexandria (4th century), a key defender of the Nicene Creed. Use spread through the Byzantine realm and remains common in Greece, Cyprus, and Orthodox communities across the Balkans and beyond. Variants and cognates include Athanasius (Latinized), Athanase (French), Atanasio (Italian/Spanish), Atanasie (Romanian), Atanas (Bulgarian/Macedonian), Atanasije (Serbian), and Afanasii/Afanasy (Russian/Ukrainian). Common Greek diminutives are Thanasis, Thanos, and Nasos; the feminine is Athanasia. Do not confuse it with Anastasios/Anastasia, which derive from “resurrection” and are etymologically distinct.