Koen sits next to 4 phonetic neighbors — Coen, Cohen, and Kona are the closest matches by sound. Most share Koen's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bold counselor, brave advisor"
"brown, dark-complexioned"
"short form of Benedict: blessed"
"shining glory"
"God will uplift"
"industrious, strong"
"follower of Dionysus"
"illustrious through nobility"
"God is gracious"
"famous spear"
"greatest of the Aemilians"
"shelter, shield"
"ruler of the people"
"vigor and power"
"God is with us"
"leader, commander (variant interpretation)"
"little warrior"
Similar sound: These names share phonetic patterns with Koen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Koen.
Rhythm: Koen is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.