The Lusatian Culture is supposedly part of the general Urnfield Culture:
'The eastern European Lusatian culture forms part of the urnfield
tradition, but continues into the Iron Age without a notable break.'
in http://en.wikipedia.org/wiki/Urnfield
Jastorf (and later Przeworsk) was a Germanic expansion.
Hallstatt was a Celtic expansion.
Was Urnfield a Venetic expansion?
Are Krahe's Old European names Venetic?