Arella sits next to 4 phonetic neighbors — Ariel, Ella, and Arabella are the closest matches by sound. Most share Arella's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"angel, messenger of God"
"rulers counsel (from Ronald)"
"dawn, morning light"
"nobility, gentle character"
"enclosed garden, place of perfect happiness"
"moonlight halo"
"noble, of noble kind"
"noble kind"
"gift from God (secondary folk etymology)"
"bright, shining (variant of Helen)"
"dark, dusky"
"the autumn season, time of reaping crops"
"God is exalted, God is the Lord"
"sky/heaven (from Hawaiian lani element)"
"festive celebration (archaic)"
"from Wales, land of Cymry"
"sea of bitterness or star of the sea"
"defender of mankind"
"divine, royal"
"life, alive"
"ewe (graceful creature)"
Similar sound: These names share phonetic patterns with Arella — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Arella.
Rhythm: Arella is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.