Short answers, pulled from the story.
Nestor the Chronicler was a monk from Kievan Rus', born around 1056 and died around 1114. He authored two confirmed hagiographies and is traditionally associated with the Primary Chronicle, the most revered historical record of medieval Kievan Rus'. The Eastern Orthodox Church later canonized him as a saint.
Nestor the Chronicler wrote two confirmed works: the Life of the Venerable Theodosius of the Kiev Caves, completed in the 1080s, and the Account about the Life and Martyrdom of the Blessed Passion Bearers Boris and Gleb, dated to the late eleventh or early twelfth century. The oldest surviving manuscript of the Account is the fourteenth-century Silvestrovskij sbornik.
The authorship of the Primary Chronicle, also known as the Tale of Bygone Years and compiled around 1113, is disputed. Traditional historiography credited Nestor with the text, earning him the nickname "the Chronicler," but many modern scholars doubt he wrote it.
Nestor the Chronicler was born around 1056 and died around 1114. He was documented as a monk at the Monastery of the Caves in Kiev in 1073, when he was commissioned to find the relics of St. Theodosius of Kiev.
Nestor the Chronicler was buried in the Near Caves. His body is among the relics preserved in the Kiev Pechersk Lavra.
Some historians use the title Nestor the Hagiographer to distinguish him from the disputed authorship of the Primary Chronicle. The name anchors his identity to the two hagiographies whose authorship is not in question, rather than to a work many modern scholars doubt he wrote.