Euan sits next to 4 phonetic neighbors — Ewan, Owen, and Juan are the closest matches by sound. Most share Euan's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"born of the yew tree"
"pure, clear"
"flowing river, running water"
"strong, noble, virtuous"
"little warrior or little church man"
"honoring God"
"high, noble, exalted"
"son of Cadán, little battle"
"rich in friends"
"protector of people"
"greatest"
"from 'deaglán', possibly 'good man'"
"black, dark-featured"
"raider, warrior"
"strong lord"
"son of grace, son of good fortune"
"spear warrior"
Similar sound: These names share phonetic patterns with Euan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Gaelic iubhar (yew) origins, giving them the same cultural heritage as Euan.
Rhythm: Euan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.