Mystery of William N. Crawford

My brother's yDNA results came back over the weekend. The matches are interesting and yet mysterious. One of those matches is to a William N. Crawford.

So, who is this William Nelson Crawford and how might I be related.

On Ancestry, I found two trees with what appears to be the same William Nelson Crawford. Neither tree has any parents identified for William N. Crawford.

One tree, has linked two different 1850 census records. One of those records I've seen before and is the household of a James & Martha (Knight) Crawford descendant.

This 1850 census record matches the family of William Crawford and Lutitia (Snodgrass) Crawford. This William Crawford is the son of James and Martha (Knight) Crawford. However, I don't have William N. Crawford as a son or grandson of James and Martha.

So, is the William N. Crawford in the 1850 census the same William Nelson Crawford who died in Washington?


Either way, how does the William N. Crawford in the census connect to either James Crawford family.