How did Mhalasapati recognize and give the name 'Sai Baba' to Gajanan Maharaj?

The provided text indicates a misunderstanding in the question's premise, as Mhalasapati did not interact with or name Gajanan Maharaj. According to the Introduction (Chapter 0), Mhalasapati, a goldsmith and devotee of Khandoba, was in the Khandoba temple when a different Maharaj arrived with a wedding procession. Upon seeing him, Mhalasapati welcomed him with the words 'Aavo Sai Baba' (Come, Sai Baba). This greeting became the name that this particular Maharaj, not Gajanan Maharaj, was known by for the rest of his life.