Feivel sits next to 3 phonetic neighbors — Faivish, Fivel, and Felix are the closest matches by sound. Most share Feivel's Greek via Yiddish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright one, shining one"
"invented modern name, possibly reflecting grace or nobility"
"be happy, rejoice, celebrate"
"small cup or hollow; topographic surname"
"lion man (from Leander)"
"eminent, brilliant"
"healer; father of Jason in Greek mythology"
"of Terentius, from the earth"
"son of Zavier; new house, bright"
"from the flat plain (geographic Irish sense)"
"Defender of men; protector of people"
"Encircled; a place of refuge"
"a plain, a flat fertile area"
"always, at all times"
Similar sound: These names share phonetic patterns with Feivel — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Yiddish origins, giving them the same cultural heritage as Feivel.
Rhythm: Feivel is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.