Trey sits next to 3 phonetic neighbors — Tre, Tray, and Grey are the closest matches by sound. Most share Trey's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"three, the third"
"visitor, pilgrim"
"short form of Benedict: blessed"
"ruler of the people"
"water, thermal waters (place name)"
"new"
"wise protector"
"ruler of the world"
"God is gracious"
"case, container (via Old French)"
"God has made, the Lord has done"
"thorny shrub, prickly plant"
"colt keeper, young horse handler"
"flat land"
"deliverance of God"
"remedy, cure (folk etymology)"
"prince's town"
"son of the victor"
"anointed one carrier"
"son of Jett, black gemstone"
"laughter"
Similar sound: These names share phonetic patterns with Trey — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Trey.
Rhythm: Trey is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.