Vajravarahi or Dorje Phagmo literally means “indestructible sow.” Depictions of this female yidam deity, who is also the ruler of the dakinis, usually has a pig's or sow’s head protruding from the crown of her head. The sow represents basic ignorance, which is transformed into highest wisdom. See also Venerable Junmai Baima Dorje Rinpoche VI
Ven. Junmai Baima Dorje Rinpoche VI of the Shechen Monastery in Tibet is a nirmanakaya of Vajravarahi. The first Junmai Baima Dorje was a famous terton and the second achieved the rainbow body. As a small child, the rinpoche could transform a thick knife into a knot. That knife is currently at Hua Zang Si in San Francisco as one of the many holy objects that they hold for public display and veneration.
See the book H.H. Dorje Chang Buddha III for a more detailed biography and Venerable Junmai Baima Dorje Rinpoche's commentary on the accomplishments of His Holiness Dorje Chang Buddha III Wan Ko Yeshe Norbu.