Trevor sits next to 3 phonetic neighbors — Tanner, Travis, and Trever are the closest matches by sound. Most share Trevor's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"large homestead, great settlement"
"to follow a course, leave a mark"
"supplanter"
"estate of the fifth son"
"handsome, beautiful"
"wave, abundant, learned"
"son of Cole"
"Yahweh remembers"
"son of Neil, son of the champion"
"modern coined name, son of Bray"
"people's power"
"dweller near the ridge"
"child"
"true, faithful"
"king"
"youthful, downy-bearded"
"land of lochs, land of fjords"
"great, venerable, majestic"
"group, band, team"
"male duck"
"seven; divine completion"
Similar sound: These names share phonetic patterns with Trevor — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Trevor.
Rhythm: Trevor is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.