Coi sits next to 4 phonetic neighbors — Coy, Joy, and Koi are the closest matches by sound. Most share Coi's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"quiet, still"
"other wealth"
"lake, waterfall, pool"
"from Berlin; swamp, marsh (Slavic root of Berlin)"
"ruler of elves"
"black, dark"
"moonlight, halo around the moon"
"whole, universal"
"gracious gift of God"
"merciful, gracious"
"bitter, beloved"
"noble eagle"
"protector, guardian"
"beautiful, gracious"
"word, speech"
"modern phonetic variant of Wyatt"
"son of James"
"completeness, satisfaction"
"tailor, one who cuts cloth"
"curly-haired"
Similar sound: These names share phonetic patterns with Coi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have French origins, giving them the same cultural heritage as Coi.
Rhythm: Coi is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.