Hi

SITKA, S^ITKA and ZERHAU in CZ's phone book.
http://phone.quick.cz
OVA is a female ending.
You might look for a German spelling of SITKA.

www.kuijsten.de/navigator
www.genealogienetz.de/reg
http://freepages.genealogy.rootsweb.com/~elainetmaddox/index...
www.genea.cz
little tidbit: In 1990 census of names there were 4 ZERHANs and 14 ZERHAUs in Poland. www.herby.com.pl in Polish and only distribution.