have a look here http://home.foni.net/~adelsforschung/lexi03.htm
where there's an entry for that family.
You can also ask for details re. the sources for your noble name (library holdings) here: http://home.foni.net/~adelsforschung/lexi03.htm#klk
This all is German, I'm afraid.
What you'll hopefully get is identification of an owner of the sources. You may then order copies of an entry, any pages etc.
you'll find a Josef Pacor etc. commanding a regiment 'Rohr', located in Sopron, in 1914.