This is probably not a match, but I was interested in your query because my great-grandmother, of whom I know little, was named Willie Baldwin, came from Virginia, and had a son named Seldon.I saw in your post that you mentioned a Willie Belle Baldwin and a Roberta Selden Pearce, and that got my attention.
Willie Baldwin married William Cocke Hill (born in Alabama in 1858, died in 1890 in Bellville, Texas).He was a newspaperman.Seldon was their elder child.Their second child, my grandmother, was named Hazel Willie Hill.She was born in Bellville on 1/6/1890 and died in Seymour, Texas, in 1983.
The date obviously isn't right for your Willie Belle Baldwin, but it could have been a popular name in the family.
The only other Baldwin I've heard anything about is a woman named Ginger S. Baldwin who did a genealogical chart of the descendants of Richard W. Ballentine, one of the men who died in the Alamo.It was deposited in the Alamo research library.Richard Ballentine was Willie Baldwin's great-uncle.
If you've heard of any of these people, I'd appreciate it if you'd let me know.