Carol
I do hope you also posted on Poland's board as to me most of your surnames seem Polish.
Here is a map of Austria-Hungary :
http://users.erols.com/mwhite28/austhung.htm 13 SZTUKs and 2 STUCKOWSKIs passed thru Ellis Island.
In 1990 in Poland there were 544 SZTUKs, 1011 SZTUKOWSKIs and 38 STUKOWSKIs.
www.herby.com.pl/herby