Casper sits next to 3 phonetic neighbors — Jasper, Gaspar, and Caspar are the closest matches by sound. Most share Casper's Dutch-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"treasurer, keeper of treasure"
"youthful, downy-bearded"
"fisherman"
"acquired, possessed"
"from Mauritania"
"the fifth-born child"
"luminous circle, sacred light"
"path, track, trail"
"deep valley dwellers"
"light, luminous"
"son of the victor"
"Hugh's settlement, town"
"elf warrior"
"father of height"
"son of James"
"noble friend, elf friend"
"western settlement"
"son of the brown-haired one"
"my God is salvation"
"dealer in provisions and supplies"
Similar sound: These names share phonetic patterns with Casper — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Persian origins, giving them the same cultural heritage as Casper.
Rhythm: Casper is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.