Lena sits next to 4 phonetic neighbors — Elena, Leena, and Lina are the closest matches by sound. Most share Lena's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright, shining light"
"bright, beautiful"
"lady, woman of rank"
"divine play"
"oarsman"
"ewe, gentle; lake"
"crowned one"
"precious gem, pearl of great price"
"night"
"olive tree"
"murmuring rock on the Rhine"
"star of the sea"
"from Laurentum, the laurel city"
"light, dawn (by association with Aurora)"
"devoted to God"
"play, amusement"
"loved, valued"
"industrious, striving"
"goddess of the moon"
"flag, banner"
"small bird (the wren)"
Similar sound: These names share phonetic patterns with Lena — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Helena origins, giving them the same cultural heritage as Lena.
Rhythm: Lena is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.