Can you elaborate on the lineage and context of Saraswati Gangadhar, the author of the 'Thorale Guru Charitra'?

The text provides specific details about the author of the 'Thorale Guru Charitra'. According to Chapter 0, the author was Shri Saraswati Gangadhar, whose surname was Sakhare. His family had a deep connection to Shri Narsimha Saraswati Maharaj, the protagonist of the biography. An ancestor, Shri Sayandev of the Sakhare family, had received the grace of Shri Narsimha Saraswati Maharaj and was given a boon that his descendants would perform constant service. As stated in Chapter 0, Shri Saraswati Gangadhar was the fifth descendant from Shri Sayandev, fulfilling this ancestral promise through his literary work.