Can you explain the circumstances that led Sai Baba to Shirdi and how he received the name by which he is known?

According to the introductory chapter of the Sai Satcharitra, the figure later known as Sai Baba arrived in Shirdi with a wedding procession for Chandbhai's wife's nephew. The procession stopped near the Khandoba temple, where he met a devotee named Mhalasapati. Mhalasapati, upon seeing the Maharaj dressed in a kafni and cap, greeted him with the words "Aavo Sai Baba," which translates to "Come, Sai Baba." As detailed in Chapter 0, Maharaj held onto this name for the rest of his life, and it became the name most of his devotees used.