Jac Diehl's birth name is Jacob Diehl.
Fred Diehl's birth name is Frederick M. Diehl.
Jim Diehl's birth name is James F. Diehl.
Kelly Diehl's birth name is Thomas K. Diehl.
Michael Diehl's birth name is Michael J. Diehl.
William Diehl's birth name is William Francis Diehl, Jr..
yes
No, it is German.
Yes, Carlson is a Swedish surname originating from the given name Carl, which is a common Swedish name. The "son" at the end of the name indicates "son of Carl" in Swedish, making it a patronymic surname.
sson in it, like andersson or pettersson, 20 percent have this syntax.
There is no conclusive evidence to suggest that Mellquist is a common Swedish last name. It is possible that it could be a rare or unique surname in Sweden, but further research would be needed to confirm its origin and prevalence in the country.
No, but it is a Swedish company. It's called Sandvik because it's based in a Swedish town called Sandviken.