Koehn sits next to 4 phonetic neighbors — Kane, Koen, and Cohen are the closest matches by sound. Most share Koehn's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"priest"
"rhythmically invented name"
"eager for battle"
"modern coinage; possibly town settlement"
"cassia, sweet-scented bark"
"small deer"
"spirit of battle"
"modern American name, phonetic creation"
"my God is Yahweh"
"battle warrior, army in battle"
"from the valley"
"gift from God, he who is sent"
"chief, lord"
"noble lineage (adal) and eager (funs)"
"renowned in the land"
"who is like God?"
"fox-colored"
"God is gracious (John) + beloved (David)"
"God is gracious"
"rich, powerful"
"Dracula spelled backwards (fictional)"
Similar sound: These names share phonetic patterns with Koehn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Koehn.
Rhythm: Koehn is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.