Echoes
Vidasus, Selvans and Silvanus
One god under three names, across The Edges of Empire, The Etruscan World and The Roman Inheritance.
Why the sources call them one god
The Roman Silvanus is directly inherited from him; the name is the same
After the Romanization, Selvans-Silvanus continued to be worshipped through the entire Roman period
He was identified in Roman inscriptions with Silvanus