William Pruet is my g-g-grandfather. I am descended from him and his first wife, Elizabeth Davison. Elizabeth died May 07, 1856 so I would say that no, William Emsweller is not William Pruet's son. In his will William left equal shares of his estate to his children and step-children. Most of the land, however, ended up with the Emswellers. I have a LOT of information on these names: Croddy, Davison, Emsweller, Pruet.
I wondered where Harriet's first husband, Joseph Emsweller, went after their divorce. Did you know that he went to prison for killing someone? I've copied all the news articles I could find on it. According to one of the articles, William talked his old friend Joe into turning himself in. Interesting reading!
FYI - Alexander Vanosdol was the first husband of Louisa J. Pruet (Brown), a dau. of Wm. and Elizabeth.
I would just LOVE to share any and all information with you!