As you can see from the table, which is one version of the genealogy, Kalypso (Calypso), the goddess who kept Odysseus as a lover on her island, Ogygia, for 7 years, is Hermes' aunt.
From Homeric Hymn to Hermes:
Muse, sing of Hermes, the son of Zeus and Maia, lord of Cyllene and Arcadia rich in flocks, the luck-bringing messenger of the immortals whom Maia bare, the rich-tressed nymph, when she was joined in love with Zeus, -- a shy goddess, for she avoided the company of the blessed gods, and lived within a deep, shady cave. There the son of Cronos used to lie with the rich-tressed nymph, unseen by deathless gods and mortal men, at dead of night while sweet sleep should hold white-armed Hera fast. And when the purpose of great Zeus was fixed in heaven, she was delivered and a notable thing was come to pass. For then she bare a son, of many shifts, blandly cunning, a robber, a cattle driver, a bringer of dreams, a watcher by night, a thief at the gates, one who was soon to show forth wonderful deeds among the deathless gods.