Germanic form of Jasper, from Persian 'ganzabara' meaning 'treasurer.' Traditionally one of the Three Magi.
Kasper is the Scandinavian, Dutch, and Central European form of Caspar or Gaspar, one of the names traditionally assigned to the Three Magi — the wise men who brought gifts to the infant Jesus. The name's origins are likely Persian, possibly related to the word ganzabara, meaning 'treasurer' or 'keeper of treasure,' which aligned neatly with the Magi's role as bearers of precious gifts. In medieval Christian tradition, Caspar was typically identified as the youngest of the three kings, depicted as clean-shaven and bearing a gift of myrrh.
Because the name was associated with one of the Magi, it was used for centuries as a charm against epilepsy and sudden illness — written on amulets or spoken as an incantation. The Dutch and German ghostly figure of Kasper evolved separately into a beloved puppet character, a quick-witted, roguish clown at the center of traditional puppet theater (Kasperle or Kasperltheater), somewhat analogous to England's Punch. This theatrical heritage gives the name an unexpectedly playful edge beneath its mystical surface.
In contemporary usage, Kasper is most common in Scandinavia and Central Europe, where it feels modern and approachable without losing its ancient resonance. In the English-speaking world, the K-spelling distinguishes it from the more familiar Casper (burdened by the friendly ghost), lending it a European sophistication. It is a name that offers history, magic, and an easy nickname all at once.