as an aside, you can see the fertility cult in the celto-germanic substratum. consider freyja. that's a southern deity, not a northern one.

http://phys.org/news/2013-10-modern-relatives-otzi-alive-austria.html
http://www.huffingtonpost.com/2012/11/09/otzi-the-icemans-genes-central-europe_n_2099809.html

everything i've seen on the topic merely upholds the cavelli-sforza component analysis that saw two pre-historical migrations into europe: farming coming from the middle east, and the indo-european languages coming in from the north, ala gimbutas.

(fuck renfrew and his biblical reconstruction)

this tells the story of the conflict...

http://en.wikipedia.org/wiki/%C3%86sir%E2%80%93Vanir_War