Falacer
or, more fully, divus pater Falacer, is mentioned by Varro as an ancient and forgotten Italian divinity, whom Hartung (Die Rel. d. Horn. ii. p. 9) is inclined to consider to be the same as Jupiter, since falandum according to Festus, was the Etruscan name for "heaven."
From Smith's Dictionary of Greek and Roman Biography and Mythology