Hello fello Maxwell's, My name is Ryan Blake Maxwell, and older brother is named Robert Blane Maxwell IV. I looked at the page naming people that could be the heir and the last person was named William Maxwell. My dad was named Robert Blane Maxwell III and so on to Robert Blane Maxwell senior. Robert Blane Maxwell's father I believe was named William Henry Maxwell. If anybody else know's more about this please contact me. Thank's cousin's and uncle's and so forth