You may have noticed that in my previous comment I made reference to tribes and Siberians. Regional information sources could be provided information related to losses of people from their region. My son had his DNA tested, and it also offered a back description of his father and his mother (me). My maternal grandparents came from East Prussia (Lithuania), and Pozen (Poznan) Poland. My information showed a strong Baltic component, but also a far, far East component ranging from 6 to 9%. Since my grandmother was Prussian petit nobility (von) was her fathers title, I suspect the far, far East may have come from the Golden Hoard or some other Hun or Asian conquest. I do know that Putin is taking many of the ethnic minorities for his slaughter, and those people should be made aware of all the dead from their regions and ethnicities even if individual persons cannot be identified.