Helen sits next to 4 phonetic neighbors — Ellen, Eleanor, and Elaine are the closest matches by sound. Most share Helen's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"torch, shining light"
"moon goddess"
"sunny, radiant"
"resolute protector"
"bearer of victory"
"help, aid"
"white hero"
"mighty in battle"
"famous warrior"
"star"
"God is my strength"
"crooked nose"
"great lord, magnificent ruler"
"fair; beautiful; harmonious"
"to open (spring)"
"bright, shining light"
"bright, shining light"
"protector of men"
"descending river"
"belief, trust in God"
"God is gracious"
Similar sound: These names share phonetic patterns with Helen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Helen.
Rhythm: Helen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.