Gallus

Gallus (plural galli) is an Ancient Hellenist and Roman religiogender for castrated priests (eunoukhoi) of the goddess Cybele (Magna Mater in Rome). In modern times a gallus may be transfeminine, transsex, an androgynon, intersex, or an AMAB transgender person.

Ancient Definitions

 * Priests, often temple attendants or wandering mendicants, of the ancient Asiatic deity, the Great Mother of the Gods, known as Cybele, or Agdistis, in Greek and Latin literature. The Galli were eunuchs attired in female garb, with long hair fragrant with ointment. - Britannica
 * Castrated and effeminate male priests ... [that] transcend gender - jeramyt.org