Silvanus is an ancient Italic rustic god of the forests, shepherds, wild places, and boundaries. Although he is assumed to be an ancient deity, material on Silvanus only comes from the 2nd century B.C.E. His epithets are pater and senex, and he was usually depicted as a ragged old man with a sickle. Most scholars reject the identification with Etruscan "Selvans" but are unsure if Silvanus is an epithet of Mars or a separate deity altogether. Much is unknown about this deity, though he was worshipped throughout the Empire.
Peter F. Dorcey "The Cult of Silvanus; a study in Roman Folk Religion", Brill 1992