What kind of a family changes their name from "Black" to an object that carries a dead body?
sor-os' Definition
- an urn or receptacle for keeping the bones of the dead
- the funeral couch or bier on which the Jews carried their dead forth to burial https://www.biblestudytools.com/lexicons/greek/nas/soros.html
Also coffin: https://www.wordhippo.com/what-is/the-meaning-of/greek-word-4e8ecdfae56267de8ddb30a59f618be7360874b4.html
Family name history here: https://www.jewishvirtuallibrary.org/george-soros
Soros means "next in line" in Hungarian. His family is Hungarian. The word also occurs in other languages. Picking and choosing is not the correct way to work.
They were Jewish. They should have known the name meant "the funeral couch or bier on which the Jews carried their dead forth to burial ".
Regardless of what country they were in, their culture was Jewish and that definition pertains.