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"
"meditation, absorption"
"royalty, ruler"
"dark settlement"
"narrow, a strait"
"lucky, perfect"
"valley, hollow"
"youthful, young one"
"God shall add (another son)"
"world-mighty"
"noble friend, elf friend"
"church official, rule of law"
"dweller by the holly"
"son of James"
"old, wise, of noble birth"
"generous, noble, honorable"
"from the city of lions"
"protector of people"
"the twin"
"claw of a bird of prey"
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.