Cohan sits next to 5 phonetic neighbors — Cohen, Cowan, and Rowan are the closest matches by sound. Most share Cohan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hound, warrior"
"calm, serene, protective"
"nobleman of the second rank"
"joyful, jovial (from the same root)"
"grove, wooded area"
"my father is peace"
"future, what is yet to come"
"God is gracious"
"modern blend of Jay + -ren"
"God has been gracious"
"son of Mart (Martin)"
"small stream, narrow inlet"
"auspicious, favorable"
"precious gem, jewel"
"marshland meadow"
"kermes-dyed, rich red"
"son of Morris/Maurice"
"elf's stone, ancient stone"
"the unseen"
"heart, mind"
"the river that swallows all rivers (from Zaire/nzadi)"
Similar sound: These names share phonetic patterns with Cohan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish origins, giving them the same cultural heritage as Cohan.
Rhythm: Cohan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.