Anyone searching for ancestors who came from the Austrian province of Galizien (Galicia in English but NOT the same as the Spanish province of the same name) ought to be looking for ROOS as the alternate spelling. There are many records of this surname in Galizien and some came from Ilbesheim, Germany in the 1700's.

Manfred Daum has village records for about 60 villages in Galizien - birth, baptismal, death, marriage etc. - which are available on CD. Do a google.com search for that name.