Leiby sits next to 4 phonetic neighbors — Laibel, Leibel, and Leibish are the closest matches by sound. Most share Leiby's Yiddish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"my heart, beloved"
"my help, my helper"
"righteous, worthy"
"blessed, fortunate"
"one who climbs to great heights"
"wise, judicious"
"trumpet, blast of a trumpet"
"joined, attached"
"lightning bolt, flash of light"
"flame of God"
"sun, sun-like"
"God is Lord (variant of Elijah)"
"red earth, clay"
"peace, repose"
Similar sound: These names share phonetic patterns with Leiby — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Yiddish origins, giving them the same cultural heritage as Leiby.
Rhythm: Leiby is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.