why posted all at board Vorarlberg?
not any connection to Bohemia and far away!
Vorarlberg: http://en.wikipedia.org/wiki/Vorarlberg
http://www.magreisen.at/OE/oesterreich-karte.gif
Bohemia: http://en.wikipedia.org/wiki/Bohemia
Czech Republic (CZ): http://en.wikipedia.org/wiki/Czech_Republic

Lang is a very usual name in german-lingual countries.
in Bohemia will be of german orgin from socalled "Sudeten-germans".
phonebook Germany: http://www.dastelefonbuch.de/
phonebook Austria: http://www.herold.at/en/telefonbuch/

better posting at Czech Board:
http://boards.ancestry.com/localities.ceeurope.czechrepublic...
or under Historical Regions > Bohemia:
http://boards.ancestry.com/localities.ceeurope.histreg/mb.as...