Caldwell sits next to 5 phonetic neighbors — Caldwell, Colwell, and Maxwell are the closest matches by sound. Most share Caldwell's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"cold well; from the cold water source"
"divine, godly"
"bought land, purchased territory"
"gentle, merciful, dear"
"mountain village; reason of the mountains (Japanese interpretation)"
"God is good, Yahweh is good"
"one who lays slates, roofer"
"nurse, foster-mother (occupational surname)"
"lord, master"
"noble friend, old friend"
"manly, strong, brave"
"Healer, one who cures"
"held by the heel (from the birth story of Jacob)"
"lively, merry"
"heart"
"absence of subjection or constraint"
"from Airelle (place in Normandy, France)"
"moonlit, luminous"
"kingly power"
Similar sound: These names share phonetic patterns with Caldwell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Caldwell.
Rhythm: Caldwell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.