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"
"flame of God"
"white, fair-complexioned"
"to dwell, commander"
"my light, my flame"
"son of Tenney"
"broad hill"
"mild, gentle"
"moon, moonlight"
"vigilant in battle (from Casey/Cathasach root)"
"boundless, countless"
"of Anthony, son of Anthony (via De- prefix)"
"cat"
"from the forest"
"ancient, enduring, long-standing"
"keen ruler, bold king"
"God supports, God heals"
"God has been gracious"
"proclaimer of peace"
"grey home, gravelly homestead"
"unbranded steer (original meaning)"
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.