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"
"illuminated, clear"
"the Lord remembers"
"saint, holy man, sage"
"brave, valiant, fearless"
"one who endures forever"
"God has remembered"
"possession, acquisition"
"blessed, fortunate"
"cosmic serpent (mythological)"
"beauty, handsomeness"
"prince, commander"
"moistening, life-giving water"
"divine mercy"
"adornment, embellishment"
"elder, senior, superior"
"lion"
"prosperous, wealthy"
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.