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"
"joy, happiness, gladness"
"feminine elaboration of George"
"ascent, going up"
"life's path, adventure"
"olive tree, symbol of peace"
"grace, mercy (via Maria)"
"chamomile flower"
"solemn, dignified"
"resolute guardian"
"desired by God, my father's desire"
"life, like a bird"
"water"
"always, at all times, eternally"
"from the heathered meadow (as short for Hadley)"
"bright, shining light"
"knowledge, sacred wisdom"
"from the ash tree farm"
"son of Andrew"
"God is gracious"
"strong in work, industrious strength"
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.