Nilus the Younger, also called Neilos of Rossano was a Griko monk and abbot from Calabria. He was the founder of Italo-Byzantine monasticism in southern Italy. He is venerated as a saint in the Eastern Orthodox and Catholic churches, and his feast day is celebrated on September 26 in both the Byzantine calendar and the Roman Martyrology.

The Griko people, also known as Grecanici in Calabria, are an ethnic Greek community of Southern Italy. They are found principally in regions of Calabria and Apulia. The Griko are believed to be remnants of the once large Ancient and Medieval Greek communities of southern Italy, although there is dispute among scholars as to whether the Griko community is directly descended from Ancient Greeks or from more recent medieval migrations during the Byzantine domination.