The Bagley family lives in Riverview. It consists of a matriarch Ma, and her two children, Sherman and Rhoda. They appear to be a long line of criminals (hinted by their surname and traits), and all their riches come from stolen objects. Ma is a retired Master Thief, while her daughter Rhoda is working her way up the Criminal career track. They also have a barn full of stolen objects.
Bagley: Meaning in bagging.
Ma: Slang for mother or mom.
Sherman: Possibly referencing Shear-men.
Rhoda: Another word for a type of sword fight.
Sam: God's hand or meaning in a different conjunction, loyal.