A.k.a. Нестор
Saint Nestor the Chronicler (c. 1056 – c. 1114, in Kiev) was the reputed author of the Primary Chronicle, (the earliest East Slavic chronicle), Life of the Venerable Theodosius of the Kiev Caves, Life of the Holy Passion Bearers, Boris and Gleb, and of the so-called Reading.The current theory about Nestor is that the Chronicle is a patchwork of many fragments of chronicles, and that the name of Nestor was attached to it because he wrote the greater part or perhaps because he put the fragments together. The name of the hegumen Sylvester is affixed to several of the manuscripts as the author.