The Germanic runes were most likely developed from alphabets used to
write the language(s?) of Noricum. Both runes and those Alpine
alphabets tend to suppress homorganic nasals before stops (or
prenasalization)
http://tech.groups.yahoo.com/group/cybalist/message/13790
The reflexes of Schrijver's language of geminates alternates
-VTT-/-V:T-/-VNT- (for T unvoiced stop), which might reflect dialectal
variation, but also paradigmatic variation.
http://tech.groups.yahoo.com/group/cybalist/message/48662
Someone facing the task of coming up with a writing system might get
the idea of leaving out any indication of prenasalization/homorganic
nasals in the writing altogether, since that phenomenon was not
morphemic. Which means the language spoken in Noricum (most likely
Venetic or something close to it) for which those alphabets were
designed might have been the donor language for the 'language of
geminates' loan in N European languages.
The name of the Norican king, Vocio/Voccio/VOKK(on coins) shows that
the language of Noricum had geminates. And =? *Wonk-, related to
Vang-ijo-, note one of Odin's names is Vak-r ?
http://en.wikipedia.org/wiki/List_of_names_of_Odin
Torsten