Name 2 figures in the Torah that their mother is their sister, their aunts and uncles are dead, and their father is their grandfather.
Papa Smurf's answer is close; I think it's Lot's daughters' sons - Moav (ancestor of the Moabites) and Ben-Ammi (ancestor of the Ammonites).
Their mothers are their sisters - because their father is Lot, the father of their respective mothers.
Their aunts and uncles are dead - because all of them were destroyed with the rest of the inhabitants of Sodom.
Their father is their grandfather - as above: he's their father as well as their (maternal) grandfather.