What is the share of my paternal grandmother's sister (my father's maternal aunt) and my paternal grandmother's maternal aunt from the inheritance of a man who has no heirs other than them?

The paternal aunt of the grandfather (mother's father) and the maternal aunt of the grandfather are both considered dhawu al-arham (relatives by kinship). The preponderant opinion is that they inherit in the absence of a sahib fard (share-taker) or an asabah (agnate). The method of their inheritance is that the existing one among them takes the place of the person through whom they are connected, and takes their share of the estate. Dhawu al-arham are all relatives who are neither share-takers nor agnates, and among them are paternal aunts and maternal aunts.