names Haslinger and Haslingen are different names.(ending)
i know von Haslingen and von Haslinger as nobility from Germany. the list shows members of an academy in Liegnitz, Silesia in 1708-1811:http://webcache.googleusercontent.com/search?q=cache:ahmMaMy...
if you write in at Suche left above von Haslingen or von Haslinger you get some results, but only in german.http://home.foni.net/~adelsforschung/index.htm
maybe you go in contact with this site:http://home.foni.net/~adelsforschung/index5.htm
i don´t know really if there were also nobility from austrian-hungarian orgin with that names.
maybe you ask at Adler/eagle Wien/Vienna if they have anything in their files for that:http://www.adler-wien.at/wDeutsch/index.shtml
otherwise Haslinger also is a "normal usual" name in german-lingual regions.....