Sorry, but I think that mine is a totally different line and now doubt that there is a connection with your group.
My Van Buren was born in 1869 Washington Co., AR and was the son of Benjamin Thomas Johnson and Matilda Jane Oxford of Washington Co., Ar.He was named for his uncle Vanburen Johnson who died at the battle of Jenkins Ferry in 1864.Benjamin Thomas and the first Vanburen were the sons of Jacob Johnson and Margaret Mahaney of Jackson Co., TN and Washington Co., AR. Jacob was the son of Nimrod Johnson and Susannah Gallion of Jackson Co., TN. I have proven these back to Nimrod through estate records in Jackson Co., TN and Washington Co., AR.Good luck in your search. Wish I could have been some help to you. Hope you find more on your Johnson family.
Know what you mean about the Smith.In addition to theJohnson, I have Brown, Jones, and Allen.