Ganesha is called Siddhidata because he is the giver of siddhi. The word siddhi means success or the accomplishment of a task. According to Hindu tradition, Ganesha is worshipped before any auspicious work or the beginning of anything new. It is believed that worshipping Ganesha removes obstacles and ensures the successful completion of the task. Reason For Calling Ganesha The Name Siddhidata There are several Hinduism stories as to why Ganesha is considered Siddhidata. Two of the most well-known stories are: The Contest of Superiority Once, a competition was held among the gods. The condition was that whoever could circle the entire world and return first would be considered the superior deity. All the gods mounted their respective vehicles and set out to circle the world. Even Kartikeya set off swiftly on his peacock. While the other gods were proud of their speed, Ganesha—riding on his mouse—circled his parents, Shiva and Parvati, and said, "To me, you both are equal...