I have a will for a John Johns in Washington County, Maryland in 1840. He refers to his son as Daniel Shang.

https://familysearch.org/pal:/MM9.3.1/TH-1942-24308-21319-66...

I have found this John Johns in family trees in Ancestry, sometimes he is listed as Johns and sometimes as Shang (Schang)

Is Johns the americanized version of Shang?