Who is John Forbes Nash, Sr. from A Beautiful Mind: A Biography of John Forbes Nash, Jr., Winner of the Nobel Prize in Economics, 1994 and what is their importance?

John Forbes Nash, Sr. was born in 1892 at his grandparents' plantation in northern Texas to Alexander and Martha Nash. He married Virginia Martin and they had two children, John Jr. and Martha. John Sr. worked for Appalachian Power until his death in September 12, 1956.