On the new Ellis Island site of immigration records I found an entry of ship manifest for the Kronprinz Wilhelm for arrival on April 4, 1906. (ship later renamed the USS von Steuben after being seized after WW1 by US)From Mark Novak
Here is a photo of ship that may have brought some of the Jungs to US.
Click to enlarge photo
Following passengers on manifest.
Kronprinz Wilhelm
Date of Arrival April 04, 1906
Port of Departure Marz
Jung, Kathe
F
21Y
M
Hungary-German
Zsombolya, Hungary
Jung, Peter
M
2Y
S
Hungary-German
Zsombolya, Hungary
Jung, Maria
F
11M
S
Hungary-German
Zsombolya, Hungary
Jung, Elisabeth
F
17Y
S
Hungary-German
Zsombolya, Hungary
The fourth column M/S is marriage status, fifth was their ethnic origin, and sixth their prior city of residence. Assuming that Kathe meant Katherine and Maria was Mary (quite likely that these records are not entirely accurate) the ages all fit what was on the http://webpages.onvoy.com/ads/jung/dates.html page that Uncle Bob sent in.
Also wasn't Lisadunt's name Elisabeth.
No John Jung on the manifest. Did he come over earlier? Either way could not find a likely entry for him at the site.