No I don't.I have wandered that myself.The speculations I have seen points to William H(enry) the son of Joseph, the son of William Vaden, II.
I also have a William Henry Vaden who is the son of Burwell Vaden, the son of William Vaden, II.
I have wandered why the first William is thought to be Martha's husband instead of the second William.
As a side note, I also have Catherine Mosley as a wife of the first William above.If both of the ladies were William Henry Vaden's wives, then Catherine would have been the first wife since Martha apparently out lived William.
Maybe one of our other cousins can shed some light on this subject.