 
 <translate> This is the relevant information: The enduring popularity of the Christmas song "Rudolph the Red-Nosed Reindeer" has led to Rudolph often joining the list, bringing the number of Santa Claus's reindeer up to nine.
Therefore, the answer is nine. <ibo> Nke a bụ ihe ọmụma dị mkpa: Ịnọgide na-ewu ewu nke abụ Krismas bụ́ "Rudolph the Red-Nosed Reindeer" emewo ka Rudolph na-esonyekarị na ndepụta ahụ, na-eme ka ọnụ ọgụgụ nke reindeer Santa Claus ruo itoolu. Ya mere, azịza ya bụ itoolu. 