I am searching for any relatives or ancestors of John Krell, born 1834/5 in Mayrhofen, Zillertal that still live in Austria or are here in the U.S.
Also, I am looking for any relatives or ancestors of Joseph Gredler, born 1862 in, what is listed as 'Zollerzella', Austria, again in Austria or the U.S. I have not been able to locate any town by that name.
Any help or point in the right direction would be very helpful and appreciated.

Thank you :)