Helius sits next to 4 phonetic neighbors — Helios, Helio, and Elias are the closest matches by sound. Most share Helius's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sun, radiant light"
"honey, sweet"
"all, completely"
"a plaything, a source of joy"
"free man"
"thatcher, roofer"
"river crossing dweller"
"son of Jack, God is gracious"
"western land, western meadow"
"moral principles, code of conduct"
"elevated, lofty"
"flowering, flourishing"
"one of the Vandal people"
Similar sound: These names share phonetic patterns with Helius — 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 Helius.
Rhythm: Helius is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.