many Stiassny to find at Jewish-Cemetry-Database Vienna - 16 pages!
http://friedhof.ikg-wien.at/result.asp?lang=en

Matriken
Wien und NÖ/Vienna and Lower-Austria
http://familia-austria.net/forschung/index.php?title=J%C3%BC...
Austria, Vienna, Jewish Registers of Births, Marriages, and Deaths, 1784-1911
https://familysearch.org/search/collection/show#uri=http://f...

Israelitische Kultusgemeinde Wien - IKG Vienna
http://www.ikg-wien.at/?lang=en
contact: http://www.ikg-wien.at/?page_id=1080&lang=en