Gaspar (Caspar or Jasper) was one of the names given to the Magi. He is the wise man who was known for giving Christ the gift of myrrh.
There are numerous modern variations such as Gaspare (Italian), Kaspar (German), Jasper or Casper (English), Kacper (Polish), Gáspár (Hungarian), Kasparov (Russian), Ιάσπερος "yiasperos" (Greek) etc.
The name day for the names above is December 25. (Christ's birth) (Feast of the Magi)