Names: Deanna and Samuel Campbell
Portrayed by: Allison Hossack & Mitch Pileggi

Dates: ???? - May 1973 (both died the same day)

Location: Lawrence, Kansas
Occupation: Hunter

No information is given about Deanna or Samuel Campbell until the episode "In the Beginning".  It is here that we find out that Mary Winchester came from a family of hunters and that both boys are named after her parents. 

Both Deanna and Samuel are killed by Azazel before he makes the deal with Mary.