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"
"ruler of glory, ruler of the world"
"straight, direct"
"one who follows the divine path"
"rejoice, be joyful"
"counsel, advice"
"beautiful, excellent"
"morning light, aurora"
"to increase, to grow"
"stony ford"
"from the tree stump clearing"
"the third (in family lineage)"
"God strengthens"
"strong, powerful"
"protector of people"
"ease, affluence, prosperity"
"Creative combination name; individual and unique"
"one who is pleasing, accepted"
"hare clearing"
"dark one, little dark one"
"mountain goat, ibex"
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.