Coy sits next to 3 phonetic neighbors — Roy, Troy, and Joy are the closest matches by sound. Most share Coy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"quiet, calm, reserved"
"coastal land, border land"
"Greece, Ionia (biblical Javan)"
"from the town, settlement"
"crew, team"
"man from the north, Northman"
"summit, top"
"rim of a shield"
"victory of the people"
"little dark one"
"of God, heavenly"
"strong, healthy"
"destined, determined"
"from Chester (place name)"
"king, sovereign"
"Harry's son, son of the ruler"
"from Airelle (a place in Normandy, France)"
"resolute protector"
"he who resembles God (rhetorical)"
"alder tree"
Similar sound: These names share phonetic patterns with Coy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Coy.
Rhythm: Coy is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.