I also believe that William is the father of Mathias but notes I have on him is that he was born about 1615 in England. He came to Virginia has a young man. First wife is unknown as far as I know. That would have been Mathias' mother. I also have read that Mathias had a older brother by 2 years and his name was William. Susannah Swann was William Marriott's second wife and did only live 8 months after they were married. I have Mathias as being born abt 1640 in Surry Cty, Va. He died in 8/1702 at Fort Smith, Va. He married Alice Warren 9/25/1674. Alice was born abt 1645 in Surry Co, Va and died after 1707. They had 4 children.