The long held belief that Alexander Baird from Monmouth Co., NJ has been disproven by DNA. DNA and paper documentation has proven that the Revolutionary War soldier, Alexander Baird of Cumberland Co. PA is his father. Alexander's father is William Baird.
As far as can be determined, the William Baird in Alabama is not related.
BTY, did you submit a DNA sample to BYU or SMGF several years ago. I have three descendants in my Baird DNA database who are descendants of Samuel and I would like to find out who they are so I can send them their results. One is the great-grandson of James Hyrum, one the great-grandson of Asa, and the third the grandson of Asa.