The Haplogroup distribution across the German Empire prior to WW1 according to FTDNA and Robert Gabel. Haplogroup I is the oldest of them and probably resembles remnants of Hunter-Gatherer lineages whilst R1b and R1a are connected to Celto-Germanic and Slavic peoples.
Living DNA Review
How useful is Living DNA to determine your ancestry? This review deals with German autosomal admixture in particular, featuring Baltic, Tuscan and Germanic components.
Do Ancestry DNA Tests Work?
Many people are understandably intrigued by the relatively new service of personal ancestry tests to determine their own origins. But how reliable are they really?