Gabriel de Lesnovo was an 11th-century Eastern Orthodox monk and hermit who lived on Mount Osogovo. Born into a noble family in Osiče, he was the son of a royal advisor and was married once before his wife passed away. He eventually became a monastic figure, associating with notable saints such as John of Rila and Joachim of Osogovo. He is primarily remembered for founding the Lesnovo Monastery, where he served as the first ktetor.