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"
"pledge, oath"
"gentle horse"
"brave, valiant (from Ry- element)"
"divine, heavenly"
"beautiful, lovely"
"lily flower"
"noble, high"
"red rose"
"youthful, downy-bearded"
"noble kind"
"solemn, dignified"
"son of Andrew"
"modern melodic invention"
"crown of laurel"
"royal valley"
"bright serpent, wise one"
"birthday, birth"
"fate, destiny shaped by one's actions"
"angry, wrathful"
"joyful hill (from Wynn + hlaw)"
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.