What is the ancestral connection between Saraswati Gangadhar, the author of the Guru Charitra, and Shri Narsimha Saraswati Maharaj?

The source material in Chapter 0 explains a significant ancestral connection. Shri Saraswati Gangadhar's ancestor, Shri Sayandev of the Sakhare family, had received the grace of Shri Narsimha Saraswati Maharaj. As a result of this grace, Shri Sayandev received a boon that his descendants would perform constant service. Fulfilling this, Shri Saraswati Gangadhar is the fifth descendant from Shri Sayandev, and his authorship of the renowned Thorale Guru Charitra is seen in this context of inherited service, as detailed in Chapter 0.