a surname of Jupiter, which is probably derived from ferire,
to strike; for persons who took an oath called upon Jupiter, if they swore falsely, to strike them as they struck the victim they sacrificed to him. (Fest. s. v. Lapidem Silicem.
) Others derived it from ferre,
because he was the giver of peace, or because people dedicated (ferebant
) to him spolia opima. (Fest. s. v. Feretrius; Liv. 1.10
; Propert. 4.10. 46; comp. JUPITER.)