Kaysen sits next to 5 phonetic neighbors — Jason, Mason, and Grayson are the closest matches by sound. Most share Kaysen's American English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"modern American creation"
"of the forest, wood-dweller"
"the great river"
"son of Benedict/Benjamin"
"growth, abundance"
"gentle, loyal one"
"God is salvation, Yahweh saves"
"first, chief"
"appointed, placed by God"
"path, track, trail"
"beauty, adornment, grace"
"noble friend, elf friend"
"he who holds firm the good"
"to heal"
"water, thermal waters (place name)"
"high-spirited person"
"strength, brave"
"meadow, woodland clearing"
"the ram"
"modern elaboration of Jason"
"continuous improvement"
Similar sound: These names share phonetic patterns with Kaysen — 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 Kaysen.
Rhythm: Kaysen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.