Khoa sits next to 5 phonetic neighbors — Koa, Coa, and Kwa are the closest matches by sound. Most share Khoa's Sino-Vietnamese-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"scholarly achievement, academic excellence"
"First ray of the sun; the reddish light of dawn"
"rocky hill town"
"God is gracious"
"excellent, the best, superior"
"lion-man"
"woodland clearing"
"of copper (from Greek kupros)"
"venerable, worthy of reverence"
"stream, flowing water"
"of Devon, creative modern coinage"
"pure, pious, light-footed"
"ornament, decoration"
"God is my fire"
"home, restful place"
"innate, born-with quality"
"one who owns date palms"
"faithful, one of faith"
"God is gracious"
"joined, attached"
"gift"
Similar sound: These names share phonetic patterns with Khoa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Sino-Vietnamese origins, giving them the same cultural heritage as Khoa.
Rhythm: Khoa is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.