The Hatfield family is a Maxis-made family in The Sims that was available from the "Get Cool Stuff" section of the official EA site for The Sims, and may still be available from this page at The Sims 1 Depot. The page at SimEchoes has pictures of their home at 9 Sim Lane. They are extremely poor, stereotypical rednecks. They have an outhouse and trash on the floor.
While players will often place this family in Neighborhood 1, it can be imported into any neighborhood.