Treshaun sits next to 5 phonetic neighbors — Deshawn, Reshawn, and Tremayne are the closest matches by sound. Most share Treshaun's Hebrew via Irish via African-American English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious (via Shaun)"
"son of Kyle"
"son of Braxton"
"variant of John"
"large gun, powerful force"
"dark-haired chieftain"
"red-haired"
"rejoice; pure"
"to gain, to win, to cultivate"
"well-formed, handsome"
"invented name; no fixed traditional meaning"
"noble, exalted, lofty"
"powerful ruler"
"little dark one"
"son of the wave, born of the sea"
"strong flow, powerful surge (river etymology)"
"invented modern name"
"high prominence, brow"
"of Mars, warlike"
"sun, throne"
"one who lays tiles"
Similar sound: These names share phonetic patterns with Treshaun — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Irish via African-American English origins, giving them the same cultural heritage as Treshaun.
Rhythm: Treshaun is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.