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"
"place name: town in Pembrokeshire, Wales"
"hill"
"from the deep valley, Devon land"
"victory of the people"
"writing feather, quill pen"
"lion"
"wheel maker, craftsman"
"just, righteous"
"rule, standard"
"fair outlook"
"connected to healing arts"
"calm, depth, trust"
"ancient, enduring"
"oak grove"
"one who throws, thrower"
"God is gracious (via Hans/John)"
"thunder, of Thor"
"son of Cadan, fighter"
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.