Selena sits next to 4 phonetic neighbors — Selene, Elena, and Serena are the closest matches by sound. Most share Selena's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"moon"
"grace, wished-for child"
"noble kind, of noble birth"
"dark-complexioned, of dark appearance"
"ocean, sea"
"patron of musicians, derived from Latin caecus meaning blind"
"symbol of peace and wisdom"
"pearl"
"hero, heroine (variant of Hayley)"
"youthful, downy"
"to flow down, descend"
"birthday (of the Lord)"
"symbol of innocence"
"of gold, golden-haired"
"truth"
"Cyneburga's meadow"
"alive, lively"
"sea and sky"
"free woman, song of joy"
"youthful, of the Julian family"
"bright, radiant, shining"
Similar sound: These names share phonetic patterns with Selena — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Selena.
Rhythm: Selena is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.