Please try this site as it will help you identify the modern name of the cities your ancestors left. After the WW II, the bitterness against Germans was intense, and many of the names were changed from the German tongue to their modern names. In Leibling's case, though, this does not seem to have happened.
This site I suggest has the German name, the Serbian or Romanian name, and the Hungarian name. For example, for Leibling, you will discover the name barely changed at all---it says:
Liebling* / Liebling / Liebling, Kedvencz