William's family went by Gundy, some used Van as a middle name.
Residences & events:
1840 Vermilion Co, IL. At census time Wm lived 2 doors from brother Jacob. His family consisted of: 1 male under 5 years of age, 1 at 10-15, William was 30-40, 2 females under 5, 1 at 5-10, 1 was 10-15, and 1 also 30-40.
Local Vermilion Co, IL history says: "William Gundy, the other brother, who came with his father in 1830, married and raised a family of seven children, who are now scattered, the sons living in Missouri. He and his wife died in 1851."