This map
http://en.wikipedia.org/wiki/Image:Germanen_50_n._Chr.png
shows how far the intruders (Germani in my interpretation, Elbe
Germani in the standard history) had reached against the original
inhabitants of Germania (NWBlock in my interpretation, North Sea
Germani on the standard history, yellow; and Celts-on-the-Rhine in my
interpretation, Rhine-Weser Germani in the standard history) had
reached by 50 CE, appr. 100 years after their arrival in Germania from
the Przeworsk culture (Oder-Warthe Germani in the standard history).
Compare with the map of -leben/-lev placenames
http://tinyurl.com/3au2wx
it seems to belong to the language of the intruders,
and the map of names in -ung
http://tinyurl.com/2jgydq
which seems to belong to the language of Celts-on-the Rhine (!)
and the map of names in -hude
http://tinyurl.com/2wwxbx
which seems to belong to the language of whoever was there in North
Germany before the intruders got there (remember the 100 year gap
between the names (presumably) and the map)
and the map of names in Büttel etc
http://tinyurl.com/yofqet
which seems to belong to a group which ended up in Rückzugsgebiete,
isolated areas no one else wanted.
The area traditionally ascribed to the ancestors of the Germani, the
Jastorf culture (dark red in this map)
http://tinyurl.com/3xpzn8
(cf with the map above)
seems to coincide with names with last element -borstel
http://tinyurl.com/36dj22
which, although in English placenames it's being correlated with a
last element *-burg-stal, doesn't seem to be Germanic.
Torsten