Hellen sits next to 4 phonetic neighbors — Helen, Ellen, and Ella are the closest matches by sound. Most share Hellen's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"torch, bright one"
"creative variant of Zia"
"blissful, from Elysium"
"modern coined name"
"land of Amerigo Vespucci"
"joy, happiness"
"youthful, downy-bearded"
"eagle"
"great queen"
"pure"
"tile maker, craftsperson"
"otherworldly paradise"
"white, fair, blessed"
"dark, dark-complexioned"
"turbulent, full of energy"
"star of the sea, beautiful"
"day's work, daily passage"
"olive tree, symbol of peace"
"grace, mercy (via Maria)"
"prophetess, oracle"
"gentle, tamed"
Similar sound: These names share phonetic patterns with Hellen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Hellen.
Rhythm: Hellen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.