Avon sits next to 4 phonetic neighbors — Evan, Ivan, and Avin are the closest matches by sound. Most share Avon's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"river"
"little Alexander"
"ruling"
"relating to time or the hours"
"brave as a bear, bold bear"
"red-haired one"
"weaver"
"Yahweh is gracious"
"beloved"
"true, faithful, trustworthy"
"noble ruler"
"stonecutter, one who works with stone"
"from Kansas City"
"from the field, outdoors warrior"
"servant of God"
"sea friend"
"counsel + guardian"
"military rank above captain"
"gift"
Similar sound: These names share phonetic patterns with Avon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic/Brythonic origins, giving them the same cultural heritage as Avon.
Rhythm: Avon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.