Quote:Thus in short: If Alois Schickelgruber was indeed the son of Georg Hiedler, Klara Pölzl was Johann Hiedler's granddaughter, or, as we said above, his niece.
Besides the "if" - try to write all that down on a paper and see the distance that possible relation.
Incest is a sexual relations between persons who, because of the nature of their kin relationships, are prohibited by law or custom from intermarrying.
Austrian law (and generally European) doesn't call such distant relations incest.