Ewan sits next to 4 phonetic neighbors — Owen, Ivan, and Ethan are the closest matches by sound. Most share Ewan's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"well-born, noble"
"messenger of God"
"tumult, noise"
"winding river"
"descendant of Aodh (fire)"
"spear, marksman"
"bright-headed warrior"
"who is like God?"
"little Aodh (fire deity)"
"little fire"
"holy river"
"little poet, little philosopher"
"fair, white (from Finn)"
"son of the fortunate one"
"wealthy protector"
"defender of men"
"warrior"
"follower of Dionysus, god of wine"
"peninsula, point of land"
Similar sound: These names share phonetic patterns with Ewan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Latin origins, giving them the same cultural heritage as Ewan.
Rhythm: Ewan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.