Quincy sits next to 3 phonetic neighbors — Quinton, Quentin, and Percy are the closest matches by sound. Most share Quincy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"estate of the fifth son"
"fifth"
"of the Frankish people"
"speckled, freckled"
"son of the army ruler"
"divinely appointed, called by God"
"whole, universal, powerful"
"dealer in provisions and supplies"
"Yahweh is my flame"
"great, venerable, majestic"
"settlement at the inhospitable place"
"barn dweller, farm settlement"
"poet"
"who is like God"
"deliverance of God"
"gracious, dear"
"loved, beloved"
"son of Ridge"
"wise protector"
"vigorous, flourishing"
"wise counselor"
Similar sound: These names share phonetic patterns with Quincy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have French/Norman origins, giving them the same cultural heritage as Quincy.
Rhythm: Quincy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.