He originally had different named reindeer
Santa originally had eight reindeer, Rudolph was not added until 1939 when Robert L. May wrote a Christmas poem to bring traffic into his store. Then his friend, Johnny Marks, wrote a song about it that was recorded by Gene Autry. However, the original reindeer’s names were Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Dunder, and Blixem.