Your William Null may be the gggrandfather I am seeking. I have that he was born possibly in Missouri and married Augusta Fly January 1 1903 (Larimer County marriage records). But the family notes a Vesta and that his middle initial was F.
Our gggranfather settled near Loveland CO near the Big Thompson canyon. He supposedly homesteaded there and raised a family consisting of Fern, Merle, Nora (and her twin) and possibly 2 others. Nora married Roy Foster and they lived in Fort Morgan, having 4 children. One is still living and resides in Fort Morgan.
Nora's eldest son was Darrell Dwight and his son Michael Roy. Mike had 2 daughters who live in the Greeley/Fort Collins area and are also my daughters. I am trying to get family charts for them but have come to some snags.
I have a listing of the parents of William to be Daniel and Sarah of Wayne County Missouri.