Santa Clause was originally associated with St. Nicholas who was a real Christian Bishop who lived during the fourth century. Here is an excerpt from a good article that tells something about his life:
The true story of Santa Claus begins with Nicholas, who was born during the third century in the village of Patara. At the time the area was Greek and is now on the southern coast of Turkey. His wealthy parents, who raised him to be a devout Christian, died in an epidemic while Nicholas was still young. Obeying Jesus' words to "sell what you own and give the money to the poor," Nicholas used his whole inheritance to assist the needy, the sick, and the suffering. He dedicated his life to serving God and was made Bishop of Myra while still a young man. Bishop Nicholas became known throughout the land for his generosity to the those in need, his love for children, and his concern for sailors and ships.
Under the Roman Emperor Diocletian, who ruthlessly persecuted Christians, Bishop Nicholas suffered for his faith, was exiled and imprisoned. The prisons were so full of bishops, priests, and deacons, there was no room for the real criminals—murderers, thieves and robbers. After his release, Nicholas attended the Council of Nicaea in AD 325. He died December 6, AD 343 in Myra and was buried in his cathedral church, where a unique relic, called manna, formed in his grave. This liquid substance, said to have healing powers, fostered the growth of devotion to Nicholas. The anniversary of his death became a day of celebration, St. Nicholas Day...read more here
St. Nicholas was also a stalwart defender of the Christian faith against heresy as this brief article explains:
The destruction of several pagan temples is also attributed to him, among them the temple of Artemis. Because the celebration of Diana's birth is on December 6, some authors have speculated that this date was deliberately chosen for Nicholas's feast day to overshadow or replace the pagan celebrations.
Not only was Nicholas intolerant of pagans, he was also intolerant of Arianism. Nicholas is listed as a participant in the First Council of Nicaea. There according to legend he became so angry upon hearing the views of Arius that he rushed over to the heretic and gave him a tremendous box on his ears, sending him to the ground.
Nicholas is also known for coming to the defence of the falsely accused, often preventing them from being executed, and for his intercession on behalf of sailors and other travelers...read more here
Don't forget that tomorrow St. Nicholas has promised to visit Good Shepherd at the 10:30am service. to bring gifts to the children.