intresting - just found this possibilities about:
http://www.ihff.at/ > Deutsche Seiten > Ortsverzeichnis > Weiter > wrote in at "Der gesuchte Ort"
the placename Sussic and got this list:
LfdNr. Früherer Ortsname Heutiger Ortsname Zuständige Pfarre(n) Kronland
25 Albrechtsried Albrechtice u Susice Albrechtice Böhmen
22395 Unterschuschitz Dolenje Susice Toplice Krain
19284 Oberschuschitz Gorenje Susice Toplice Krain
18979 Neudirnbach Nova Susica Smihel Dolane Krain
22423 Untersuschitz Spodnja Susica Bizeljsko Steiermark
20543 Schuschitz Susica Krka Krain
12436 Oschitz Susice Pavlovice Böhmen
12437 Schüttenhofen Susice Susice Böhmen
12438 Suschitz Susice Postupice Böhmen
12439 Suschitz Susice Micov Böhmen
64250 Suschitz Susice Jalubi Mähren
64251 Suschitz Susice Pavlovice u Prerova Mähren
64252 Suschitz Susice Moravska Trebova Mähren
19309 Obersuschitz Zgornja Susica Bizeljsko Steiermark
Früherer Ortsname = former placename
Heutiger Ortsname = todays placename
Zuständige Pfarre(n) = competent parish (-office)
Kronland = crownland
Böhmen = Bohemia now Czech.Rep.
Krain = Carniola now Slovenia
Steiermark = Styria in todays Austria but possible there standing for Untersteiermark means "Lower-Styria" = Stajerska now Slovenia
Mähren = Moravia now czech.Rep.
which familyname had this ancestor from "Sussif"
so maybe makes easier to find.....