Could you explain the lineage of Saraswati Gangadhar, the author of the 'Thorale Guru Charitra'?

The preface provides specific details about the family history of Saraswati Gangadhar, the author of the 'Thorale Guru Charitra'. According to Chapter 0, his surname was Sakhare. An ancestor in this Sakhare family, named Shri Sayandev, received the grace of Shri Narsimha Saraswati Maharaj. This grace came with a boon that his descendants would perpetually perform the Maharaj's service. The text states that Shri Saraswati Gangadhar is the fifth descendant in this lineage from Shri Sayandev, fulfilling the ancestral commitment to service through his writing.