Can you explain how Maharaj got the name 'Sai Baba'?

The name 'Sai Baba' was given to Maharaj upon his arrival in Shirdi. As Chapter 0 recounts, after arriving with a wedding procession, Maharaj went into the Khandoba temple. There, a resident goldsmith named Mhalasapati saw him for the first time. Upon seeing Maharaj, who wore a kafni, cap, and dhoti, Mhalasapati immediately greeted him with the words "Aavo Sai Baba," which means "Come, Sai Baba." Maharaj accepted and kept this name for the rest of his life. The text even notes that when his testimony was later taken in a commission and he was asked his name, he replied, "They call me Sai Baba."