Erin Walton is a fictional character from the 1970s television series The Waltons. She is the eldest daughter of John and Olivia Walton, and is portrayed by actress Mary McDonough. Sam Walton is the founder of Walmart, one of the largest retail stores in the world. Geer Walton was an American businessman and philanthropist who was the brother of Sam Walton. Waite Walton was the father of Sam and Geer Walton. Izaak Walton was an English writer and angler who wrote the book The Compleat Angler. Sams was a department store chain founded by Sam Walton. MAMA Walton was the mother of Sam and Geer Walton.