Cason sits next to 5 phonetic neighbors — Carson, Mason, and Jason are the closest matches by sound. Most share Cason's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of the marsh dwellers"
"chief friend, noble friend"
"praise through music"
"the bear"
"of the forest; woodland"
"lord, sun"
"boisterous, spirited, lively"
"son of the cloud"
"little cloak, beloved"
"plum tree (unrelated homophone)"
"companion, fellow traveler"
"defender of men"
"young warrior, free man"
"thunder and lightning"
"remembered by Yahweh"
"thorny shrub, prickly plant"
"fifth, born fifth"
"open, beginning"
"one who lives near the fens or marshes"
"supplanter's son"
"long hill, ridge"
Similar sound: These names share phonetic patterns with Cason — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English/Scottish (via Carson) origins, giving them the same cultural heritage as Cason.
Rhythm: Cason is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.