Jasper sits next to 3 phonetic neighbors — Casper, Caspar, and Vesper are the closest matches by sound. Most share Jasper's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"treasurer, keeper of treasure"
"beloved, dear"
"bearer of Christ, Christ-carrier"
"God has heard"
"son of the young warrior"
"little warrior"
"crooked, enclosed valley"
"from the surname Cauvin"
"God is gracious (via Jack, from John)"
"little one"
"just, righteous"
"supplanter's son (via James → Jacob)"
"one who transports goods by cart"
"from Judah (the tribe)"
"God is gracious"
"animal enclosure, warren"
"people's champion, victorious"
"firm foundation"
"rye clearing"
"born on Sunday"
"cheerful, pleasant"
Similar sound: These names share phonetic patterns with Jasper — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Persian origins, giving them the same cultural heritage as Jasper.
Rhythm: Jasper is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.