Why does the author interrupt the main narrative to explain how he got the name 'Hemadpant'?

The author pauses the main life story of Sai to explain the origin of his name, "Hemadpant," because he was reminded of a promise he made to his readers. As Chapter 2 explains, upon writing the words "Do not engage in dualistic explanations," the author recalled his pledge from the end of the first chapter to tell this story. He feels that satisfying the listeners' natural curiosity about the name they see at the end of each chapter is appropriate and, importantly, considers this sub-story to be an inspiration from Sai himself. He assures the reader that the main sequence of Sai's life story will continue after this brief but relevant digression.