Does the niece inherit from her unmarried aunt who died after her brother, or is inheritance restricted to males (the brother's sons) only?

The niece does not inherit from her paternal or maternal uncle/aunt because she is not among the female inheritors. If there is no closer heir, the male children of the full brother inherit, or the male children of the half-brother (from the father's side) if there is no full brother. The female inheritors are: the mother, the grandmother (from both maternal and paternal sides), the wife, the daughter, the son's daughter, the full sister, the half-sister (from the father's side), the half-sister (from the mother's side), and the freedwoman. As for the male inheritors, they are: the father, the grandfather (from the father's side), the son, the son's son, the full brother, the half-brother (from the father's side), the half-brother (from the mother's side), the son of the full brother, the son of the half-brother (from the father's side), the full paternal uncle, the half paternal uncle (from the father's side), the son of the full paternal uncle, the son of the half paternal uncle (from the father's side), the husband, the freedman, and his agnatic relatives who are self-reliant inheritors.