Who were hades nieces?

Persephone, as daughter of Demeter and Zeus (both of them the brother and sister of Hades) most assuredly married his niece. For the sake of cutting this short, I'll only include divine (goddesses) nieces.

From only Hestia did he receive no nephews or nieces. His siblings include:

Zeus; the Fates (Klotho, Lakhesis, Atropos); the Seasons (Eunomia, Eirene, and Dike) the Muses (Kalliope, Kleio, Ourania, Thaleia, Melpomene, Polyhymnia, Erato, Euterpe, Terpsikhore); Artemis, Aphrodite, Melinoe, Ate, Eris, the Litai (Prayers), Alathea, Harmonia, Britomartis, Pandia, Hersa, Nemea, Agdistis-Kybele, among many other nymph daughters.

Hera; Hebe, Eileithyia, the Charites

Demeter; Persephone, Despoena and Chrysothemis

Poseidon; Aithousa, Herophile, Ourea, Cymopoleia, Benthesicyme, Rhode, Charybdis, and Athena among many other nymph daughters.