Osman sits next to 4 phonetic neighbors — Othman, Usman, and Ottoman are the closest matches by sound. Most share Osman's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"young bird, baby bustard"
"ruler, leader"
"lion"
"resolute, strong-willed"
"blessed, fortunate"
"ancient, enduring"
"universe, cosmos"
"prosperous, populous"
"prosperous, wealthy"
"eternal, immortal, everlasting"
"strong, mighty"
"possession, acquisition"
"elegant, attractive"
"God has remembered"
"moistening, life-giving water"
"prince, commander, ruler"
"enlightened, bright, intelligent"
"saint, holy man, sage"
Similar sound: These names share phonetic patterns with Osman — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Osman.
Rhythm: Osman is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.