Khoi sits next to 3 phonetic neighbors — Coy, Koi, and Roy are the closest matches by sound. Most share Khoi's Vietnamese-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"group, collective"
"merciful, compassionate"
"cherished part of the heart"
"Frankish man"
"he enlightens"
"God has given"
"invented melodic name"
"earth mother devotee"
"of the forest, woodland dweller"
"continuous improvement"
"hollow, vain (from Latin Cassius)"
"son of Edie (prosperous guardian)"
"slender warrior (Celtic phonetic elements)"
"loved, cherished"
"twin"
"one who does not follow the herd"
"strong, noble, virtuous"
"generous giver, quenching thirst"
"powerful, mighty"
"relating to time or the hours"
"woodland clearing"
Similar sound: These names share phonetic patterns with Khoi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Vietnamese origins, giving them the same cultural heritage as Khoi.
Rhythm: Khoi is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.