Uthman sits next to 3 phonetic neighbors — Osman, Othman, and Ottoman are the closest matches by sound. Most share Uthman's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"protective friend"
"abundance, prosperity"
"growth, increase, abundance"
"most noble, most honorable"
"man (mind/soul) + raj (king/kingdom)"
"man of peace"
"sandalwood tree"
"goodness, virtue, the best"
"prosperous, long-lived"
"West African form of Suleiman, from Hebrew Shlomo meaning peace"
"handsome, beautiful"
"noble, high-born, aristocratic"
"satisfaction, approval"
"abundant, full of blessings"
"ancient, eternal"
"great, magnificent, mighty"
"black, dark; time"
"satiated, full of life"
"sincere conviction, faithfulness"
"exalted, supreme"
Similar sound: These names share phonetic patterns with Uthman — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Uthman.
Rhythm: Uthman is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.