Kasen sits next to 5 phonetic neighbors — Cason, Kason, and Jason are the closest matches by sound. Most share Kasen's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"modern American coinage, son of Case"
"noble, illustrious"
"firebrand"
"battle, warrior spirit"
"man from South Munster"
"river that swallows all rivers"
"God has remembered"
"consecrated, increased"
"noble bright (adal + beraht)"
"elder, more important"
"people's victory"
"mill worker, grain grinder"
"rich spear, lucky warrior"
"little warrior, war-associated"
"from Lucania"
"favored by the gods"
"sea-born, born of the sea"
"title of honor, great one"
"Paega's settlement"
"father of height"
"lover of horses"
Similar sound: These names share phonetic patterns with Kasen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American English origins, giving them the same cultural heritage as Kasen.
Rhythm: Kasen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.