Angitia is a goddess of the Marsian People from what is now the L'Aquila region of Abruzzo, Italy. Her name may refer to her ability to take away pain in some way
She likely had some relationship to the lake Fucinus
The roman writers often associate her with the Colchian sorceress Medea either claiming that the Marsians worshipped Medea or Circe or saying that Angitia was a relative of theirs
There came a priest as well, of the Marruvian race, sent by King Archippus, sporting a frond of fruitful olive above his helmet, Umbro the most-valiant, who, by incantation and touch, was able to shed sleep on the race of vipers and water-snakes with poisonous breath, soothing their anger, and curing their bites, by his arts. But he had no power to heal a blow from a Trojan spear-point, nor did sleep-inducing charms, or herbs found on Marsian hills, help him against wounds. For you, Angitia’s grove wept: Fucinus’s glassy wave, for you: for you, the crystal lakes.
Aeneid, Virgil, AD 19, Translated by: A. S. Kline
There was nothing more highly admired than an intimate knowledge of plants, in ancient times. It is long since the means were discovered of calculating before-hand, not only the day or the night, but the very hour even at which an eclipse of the sun or moon is to take place; and yet the greater part of the lower classes still remain firmly persuaded that these phenomena are brought about by compulsion, through the agency of herbs and enchantments, and that the knowledge of this art is confined almost exclusively to females. What country, in fact, is not filled with the fabulous stories about Medea of Colchis and other sorceresses, the Italian Circe in particular, who has been elevated to the rank of a divinity even? It is with reference to her, I am of opinion, that Æschylus, one of the most ancient of the poets, asserts that Italy is covered with plants endowed with potent effects, and that many writers say the same of Circeii, the place of her abode. Another great proof too that such is the case, is the fact, that the nation of the Marsi, descendants of a son of Circe, are well known still to possess the art of taming serpents.
Natural History, Pliny the Elder, AD 77-79, Translated by:John Bostock & Henry T. Riley
They all knew how to wage war, yet the Marsi could not merely fight but also send snakes to sleep by the use of spells, and rob the serpent’s tooth of venom by means of herbs and charms. Anguitia, they say, a daughter of Aeetes, first showed them the use of magic herbs, teaching them how to banish the moon from the sky, to halt the flow of rivers with their cries, denude the hills by summoning the trees. Their name though derives from Marsyas, who fleeing in fear over the sea from Phrygian Crenai, after Apollo’s lyre outplayed his Mygdonian flute, settled there. Maruvium, is their capital, which bears the famous name of the ancient Marrus, while further inland lies Alba Fucens, among the water-meadows, fruit-trees compensating for its lack of corn. Their other citadels, with no name among the people, unknown to fame, are nonetheless ample in number, too.
Punica, Silius Italicus, AD c.83-92, Translated by: A. S. Kline
Moreover, the Marrubia also came from the tribe of the priestess Medea, when she left Colchis and followed Jason, and is said to have reached Italy, and to certain peoples living around the great lake Fucine, who were called Marrubii, as if they lived near the sea, because of the size of the marsh, she taught remedies against snakes: although others would have them called Marrubii by the king. These people therefore called Medea Angitia from the fact that they tormented snakes with her songs. From these he now says that Umbro came, not a king, but a leader. Now these are the people of the Marsi.
Commentary on the Aeneid, Servius the Grammarian, c. 4th-5th century AD, Translated with google translate