Jack Montgomery's father

This unnamed rugaru was the father of Jack Montgomery.

Background
This man lived an ordinary life as a dentist until he began transforming into a rugaru in 1978. The hunter Travis promptly killed him. The man's wife, who was pregnant at the time, gave their son up for adoption. Convinced the child had the rugaru gene within him, Travis kept an eye on the child, now known as Jack Montgomery, and after thirty years he would attempt to kill Jack along with Jack's pregnant wife.

Jack himself, at the very last stage of his transformation, attacked and killed Travis, avenging his father. However, Jack himself was killed by Sam and Dean Winchester, for he had become too dangerous. Meanwhile, Jack's wife fled the house, leaving her whereabouts and her child's unknown.