In one of this people's myths, a shapeshifter in an orchard disguises himself as an old woman to seduce the goddess of fruit. An ancestor of these people saw a white sow suckling thirty white piglets. This society got three books of prophecy from a prophetess who burned six of the original set. One of their gods protected them with a volcanic hot spring, and was honored with an open gate in times of war. The Golden Bough 
In one of this people's myths, a shapeshifter in an orchard disguises himself as an old woman to seduce the goddess of fruit. An ancestor of these people saw a white sow suckling thirty white piglets. This society got three books of prophecy from a prophetess who burned six of the original set. One of their gods protected them with a volcanic hot spring, and was honored with an open gate in times of war. The Golden Bough was a mythical object for these people, who worshipped the "Unconquered Sun" and adapted many Etruscan gods. For 10 points, name this ancient people whose gods included Pomona, two-faced Janus, and the war goddess Minerva.
In one of this people's myths, a shapeshifter in an orchard disguises himself as an old woman to seduce the goddess of fruit.
Romans [or Romani; do NOT accept "Greeks" at any point] 