Kopen sits next to 4 phonetic neighbors — Kobe, Cohen, and Copen are the closest matches by sound. Most share Kopen's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"to buy, to trade, merchant"
"lone champion"
"royal advisor, kingly counselor"
"pure, bright, shining"
"Inspired by the Japanese Kaizen philosophy meaning 'continuous impr..."
"a magical charm or spell; also a curse"
"happy, blessed, fortunate"
"brave lion, lion-strong"
"compassion of God"
"prince"
"sensitive perceiver, artist of words"
"barley grain, of the barley field"
"destruction, ruin"
"Blend of Fran (free man) and -yel (God); free under God"
"Lofty; exalted; high mountain"
"modern invented name combining elements of strength and wisdom"
Similar sound: These names share phonetic patterns with Kopen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Dutch/Germanic origins, giving them the same cultural heritage as Kopen.
Rhythm: Kopen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.