I don’t go head over heels on ancestry study for my own life, only and loosely to 965 and the Jews and Poland and now the USA. But I’d advise studying all four grandparents, parents, and what makes their nationalities unique.
As Orwell said, “The Lie became the TRUTH!” Everything we have is a lie. We only skim the surface. Also Orwells stressed our “understand,” not held in straightjackets under insane jewish laws as in Poland, the USA and all White countries until today. No other race nor religion has suffered such martyrdom. Our suffering and silencing must be over and our joy surface so we can be rational, intelligent, honest, and happy with God, (your highest ideas) ourselves, and others.