Ossa

The personification of rumour or report, the Latin Fama. As it is often impossible to trace a report to its source, it is said to come from Zeus, and hence Ossa is called the messenger of Zeus (Odyssey of Homer).

Sophocles calls her a daughter of Hope, and the poets, both Greek and Latin, have indulged in various imaginary descriptions of Ossa or Fama (Aeneid by Virgil, Metamorphoses by Ovid, etc.). At Athens she was honoured with an altar. (Pausanias Book 1)

From Smith's Dictionary of Greek and Roman Biography and Mythology

From The Odyssey of Homer. Book XI

'And after her I beheld Iphimedeia, bed-fellow of Aloeus, who said that she had lain with Poseidon, and she bare children twain, but short of life were they, godlike Otus and far-famed Ephialtes. Now these were the tallest men that earth, the graingiver, ever reared, and far the goodliest after the renowned Orion. At nine seasons old they were of breadth nine cubits, and nine fathoms in height. They it was who threatened to raise even against the immortals in Olympus the din of stormy war. They strove to pile Ossa on Olympus, and on Ossa Pelion with the trembling forest leaves, that there might be a pathway to the sky. Yea, and they would have accomplished it, had they reached the full measure of manhood. But the son of Zeus, whom Leto of the fair locks bare, destroyed the twain, ere the down had bloomed beneath their temples, and darkened their chins with the blossom of youth.

From Apollodorus I

Poseidon met her and begat two sons, Otus and Ephialtes, who are called the Aloads. These grew every year a cubit in breadth and a fathom in height; and when they were nine years old, being nine cubits broad and nine fathoms high, they resolved to fight against the gods, and they set Ossa on Olympus, and having set Pelion on Ossa they threatened by means of these mountains to ascend up to heaven, and they said that by filling up the sea with the mountains they would make it dry land, and the land they would make sea.