Sycorax

Sycorax can refer to

Sycorax (moon), a moon of Uranus.
Sycorax, a fictional character mentioned though not seen in William Shakespeare's play The Tempest. Prospero refers to her as a foul witch from Algiers who was banished to the island on the accusation of practicing sorcery. Sailors left her on the isle pregnant with her son, Caliban, and while she was there she enslaved spirits to do her bidding. Chief among them was Ariel, whom she eventually imprisoned in a pine tree for disobedience. Sycorax, who "with age and envy / Was grown into a hoop", taught Caliban to worship the god Setebos but died before the arrival of Prospero and his daughter, Miranda.
The Sycorax, an alien race from the Doctor Who episode The Christmas Invasion.