Continuity mistake: Pilot: The mud on Dr. Quinn's face alters in size and shape between when she is meeting the Coopers and when she is upstairs in the room looking into the mirror. (00:09:00)
Continuity mistake: Pilot: After Dr. Quinn has had her tooth pulled, she talks to Mrs. Cooper, and her hair changes during shots, most noticeably on her forehead and near her left ear. (00:38:00)
Answer: A Cooper was someone who made various things out of wood including wooden caskets and even barrels.