Coah sits next to 4 phonetic neighbors — Coe, Coach, and Cole are the closest matches by sound. Most share Coah's American English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"possibly derived from Noah (rest, comfort)"
"brilliant whiteness, purity"
"power, might"
"artisan, worker in hard materials"
"rallying banner"
"rocky hill, outcropping"
"rapid strike"
"dove (the bird)"
"western meadow"
"one who crosses; toll collector at a crossing"
Similar sound: These names share phonetic patterns with Coah — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American English origins, giving them the same cultural heritage as Coah.
Rhythm: Coah is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.