Answer the following question: I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "According to this narrative, shortly after the birth of young prince Gautama, an astrologer named Asita visited the young prince's father, Suddhodana, and prophesied that Siddhartha would either become a great king or renounce the material world to become a holy man, depending on whether he saw what life was like outside the palace walls."?
Answer:
The original last name of Buddha, the holy figure of Buddhism is?