Bob Ray Sanders explains in the Fort Worth Star-Telegram how his father, James McKinley Sanders, came to be known as "Dick Cheney."
Dad's mother died when he was 12, and he was raised by his maternal grandparents, Major and Malinda Cheney. He was one of the heirs to their estate.
So it's easy to see how he was referred to as a "Cheney" boy, having been raised on what many in the Riverside area and other parts of the county referred to as "the Cheney ranch." But where does the "Dick" come from? [Link]The "Dick" comes from Major Cheney's father, Richard.
When asked by his niece, "Do you really suppose we're related to the vice president?" Sanders responded, "Let's not go there."