Can you explain the origin of the name 'Sai Baba' as described in the introductory chapter?

The name 'Sai Baba' was bestowed upon Maharaj upon his arrival in Shirdi. As detailed in Chapter 0, when Maharaj entered the Khandoba temple, a resident goldsmith named Mhalasapati saw him and greeted him with the words "Aavo Sai Baba," which means "Come, Sai Baba." Maharaj accepted and held this name until the end of his life. The text confirms this by noting that most of his devotees called him Sai Baba and that he himself acknowledged this name when his testimony was taken in a commission, stating, "They call me Sai Baba."