In the episode "Earl's Big Jackpot," which featured Richfield's mother, it was revealed that the initial "B" in Richfield's name stands for "Bradley." Other known relatives include a nephew (whose head was bitten off by Richfield) and an unseen wife. Richfield recalls the joy he felt when pushing his mother-in-law over a cliff on Hurling Day. His last name, Richfield, is derived from the Richfield Oil Company, while his first two initials are taken from British Petroleum, another gas company.