Elo sits next to 4 phonetic neighbors — Elio, Elo, and Leo are the closest matches by sound. Most share Elo's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"life, grain"
"citadel, fortress"
"the strait, narrow waterway"
"green, blooming"
"raven"
"daylight, the day"
"loving, affectionate (if from Philemon)"
"flower settlement"
"The great; the large"
"pillar, column"
"of noble birth"
"gift"
"small, little"
"eagle"
Similar sound: These names share phonetic patterns with Elo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Finnish origins, giving them the same cultural heritage as Elo.
Rhythm: Elo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.