Rudolph's father was a reindeer named Blitzen, who was known for his speed and agility. He was a great friend and partner to Santa's reindeer team, and he was always eager to help out in any way he could. When Rudolph was born, Blitzen was overjoyed and took on the role of a loving and supportive father, teaching Rudolph everything he knew about flying and guiding him through the skies.