Tityos or Tityus (Greek: Τιτυός)^[1]https://en.wikipedia.org/wiki/Tityos was a giant from Greek mythology.

Tityos

Tityos was the son of Elara; his father was Zeus. Zeus hid Elara from his wife, Hera, by placing her deep beneath the earth. Tityos grew so large that he split his mother’s womb, and he was carried to term by Gaia, the Earth. Once grown, Tityos attempted to rape Leto at the behest of Hera. He was later slain by Artemis and Apollo. As punishment, he was stretched out in Tartarus and tortured by two vultures who fed on his liver, which grew back every night. This punishment is comparable to that of the Titan Prometheus.

Greek^[2]http://www.mythologydictionary.com/tityus-mythology.html – A giant. Son of Zeus and Gaea or Elare. Father of Europe. Some say he was one of the Earthborn Giants, son of Uranus and Gaea, others equate him with Titias. He was killed by Apollo, Artemis or Zeus when attempting to rape Artemis or Leto and was condemned to Tartarus where he was stretched out and fastened by his arms and legs to the ground, covering nine acres, while his liver was eaten by vultures.

Occasionally identified as:

• Tityus
• Tituos
• Tituos
• Tityus
• Tityos
• Tityos
• Tityus. 

Greek – God of the waning year. It was said that he was killed by Heracles at the winter games.

In the early first century, when the geographer Strabo visited Panopeus (ix.3.423), he was reminded by the local people that it was the abode of Tityos and recalled the fact that the Phaeacians had carried Rhadamanthys in their boats to visit Tityos, according to Homer. There on Euboea at the time of Strabo they were still showing a “cave called Elarion from Elara who was mother to Tityos, and a hero-shrine of Tityos, and some kind of honours are mentioned which are paid him.” It is clear that the local hero-cult had been superseded by the cult of the Olympian gods, an Olympian father provided, and the hero demonized. A comparable giant chthonic pre-Olympian of a Titan-like order is Orion.

More Details: https://en.wikipedia.org/wiki/Tityos