Devon sits next to 4 phonetic neighbors — Devin, Kevin, and Evan are the closest matches by sound. Most share Devon's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"deep valley dwellers"
"little raven"
"wealthy guardian"
"son of John (via Jack)"
"tall stone"
"cheerful, optimistic"
"noble power, powerful ruler"
"slender"
"little ancient one"
"God is gracious"
"son of the marsh dwellers"
"one who brings news"
"help, helper"
"son of Jett, black gemstone"
"one who works a lathe, craftsman"
"Trent's town, settlement on the Trent"
"wealthy guardian, guardian of fortune"
"chief friend, noble friend"
"healer (via Jason)"
"immortal, not mortal"
"son of Cole"
Similar sound: These names share phonetic patterns with Devon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic origins, giving them the same cultural heritage as Devon.
Rhythm: Devon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.