This is a very old query but maybe you will see it. You said in your message you were looking for a Mangrum connection. The only Mangrum connection I am familiar with are my grandparents. Mary Francis White (daughter of Richard White, son of Joseph Arnold White, son of Sanders White) married my Willie Ray Mangrum of Dallas. They have been married 62 years but before them I do not believe their is a Mangrum connection to the Whites.