<< I am trying to locate information about a family with the surname ZWILLINGER. I think there is a link between this name and my grandfather. >>
==There was an extended family ZWILLINGER (meaning = twins) out of Vienna in the 17th-19th centuries that also went withe the Hebrew form of the name, TEOMIM. They were connected to all the prominent families of the era, especially the FRANK/FRAENKELs.
==CAUTION: The above information is firm in my memory but I found no reference to ZWILLINGER in the EncycJud when I checked there.
==You can find some genealogica information on the name by googling.