I'm sure the Last William you have listed was William Stanhope Erwin the 3rd. He Married Cleon Burns and they had seveal Children I only know the names of two son: Harry crawford Erwin, and William Stanhope Erwin the 4th. William S. Erwin the 4th died at a young age from Typhoid. Harry C. Erwin Married Annie Louise Withrow they had 3 Children Harry Erwin Jr, William Stanhope Erwin the 5th, and Pamela Erwin. William "Stan" Stanhope Erwin is the only living sibling as my Aunt Amy stated. William "Stan" Erwin had a Son whom he Named William "Bill" Stanhope Erwin the 6th, who had my brother William "Will" Stanhope Erwin the 7th.

I love the Erwin history and I want to say William Stanhope Erwin the 3rd also had a son name Alexadner as well. I do know that Alexander is a family name carried over from Scotland dating back to the early 1500s.

If you are interested I have a awesome Website of the Erwin family. http://www.irvineclan.com/drum.htm