Chauncey sits next to 3 phonetic neighbors — Chancy, Ansel, and Percy are the closest matches by sound. Most share Chauncey's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"chancellor, keeper of records"
"valley dweller"
"my God is the Lord"
"letter Z sound"
"oak trees, oak grove"
"God has heard"
"manly, courageous, strong"
"hollow, seething pool"
"modern invented name"
"thunder warrior, thunder bear"
"son of Jack"
"God is salvation (via Joshua/Hebrew connection)"
"God supports, God heals"
"one who bakes"
"son of Thomas, son of the twin"
"rock, mass"
"free man"
"farm on a hill, settlement by a mound"
"gift of God"
"kind birth"
"rational thought, good judgment"
Similar sound: These names share phonetic patterns with Chauncey — 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 Chauncey.
Rhythm: Chauncey is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.