Evan sits next to 4 phonetic neighbors — Ivan, Owen, and Ewan are the closest matches by sound. Most share Evan's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"blessed"
"twin, double"
"great warrior, one who cuts down"
"independent thinker, non-conformist"
"young warrior"
"brave as a lion"
"sea"
"east town"
"one who carries Christ in heart"
"horseman, knight"
"of Mars, warlike"
"earth (in Arabic, adama)"
"firm foundation"
"powerful warrior"
"one who transports goods by cart"
"helpful; assistant; descendant of the helpful one"
"rich protector"
"upright, fair"
"warrior, brave one"
Similar sound: These names share phonetic patterns with Evan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh form of John origins, giving them the same cultural heritage as Evan.
Rhythm: Evan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.