My James H. was Elizabeth's son. He was my paternal Great-Grandfather. He(James H.) married Nancy Ramey and she outlived him by a number of years.. James died in 1909. I do not think your James and my James are related. I do not know why my James took the last name of Coleman. I guess his mother was married so many times that he just decided to take that name.
If I can help any further let me know.