Athanasius sits next to 4 phonetic neighbors — Nathaniel, Anastasius, and Ignatius are the closest matches by sound. Most share Athanasius's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"immortal, undying"
"deliverance, rescue"
"faithful as a dog, devoted"
"my help is God"
"lord have mercy (liturgical phrase)"
"of the lion lineage"
"father of a gift"
"defender of men, protector of the people"
"excellent end goal"
"my God is majesty, God is splendor"
"God is my strength"
"heather, heath plant"
"Yahweh saves"
"my helper is God"
"God is strength, aided by God"
"blind one (folk etymology)"
"flowing"
"my God is Yahweh"
"mountain of strength, exalted"
Similar sound: These names share phonetic patterns with Athanasius — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Ancient Greek origins, giving them the same cultural heritage as Athanasius.
Rhythm: Athanasius is a 5-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.