Who was Shri Saraswati Gangadhar and what was his connection to Shri Narsimha Saraswati Maharaj?

According to the information presented in Chapter 0, Shri Saraswati Gangadhar was the author of a famous Guru biography, the Brihad Guru Charitra. His family name was Sakhare. The text establishes a significant ancestral connection to Shri Narsimha Saraswati Maharaj. An ancestor of his, Shri Sayandev, had received the grace of Shri Narsimha Saraswati Maharaj and was given a boon that his descendants would perform constant service. As noted in Chapter 0, Shri Saraswati Gangadhar was the fifth descendant in this lineage from Shri Sayandev, fulfilling this ancestral duty through his biographical work.