Atlus sits next to 3 phonetic neighbors — Atlas, Atticus, and Alistair are the closest matches by sound. Most share Atlus's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"to carry, to endure"
"watchful, alert, vigilant"
"founder, first king"
"ornament, necklace"
"beloved, praised"
"little fire (via Aidan)"
"mountain of strength, exalted"
"my father is peace"
"courtesy, respect, gratitude"
"godly, divine"
"fire, flame"
"gracious, dear one"
"long-lived, permanent"
"of God"
"new house"
"elf ruler"
"shining, radiant, brilliant"
"God is gracious"
"imperial authority"
"wise counsel and army, counseling warrior"
"bright, bold (from 'Kash' element)"
Similar sound: These names share phonetic patterns with Atlus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Atlus.
Rhythm: Atlus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.