According to Plato, Autochthon was one of the ten kings of Atlantis.
The word autochthon (n.) means “one sprung from the soil he inhabits” (plural autochthones), from Greek autokhthon “aborigines, natives,” literally “sprung from the land itself,” used of the Athenians and others who claimed descent from the Pelasgians, from auto- “self” (see auto-) + khthon “land, earth, soil” (see chthonic).
Following extract: Atlantis, the Antediluvian World, by Ignatius Donnelly,  (source: sacred-texts.com)
A priest of Sais said to Solon,
“You Greeks are novices in knowledge of antiquity. You are ignorant of what passed either here or among yourselves in days of old. The history of eight thousand years is deposited in our sacred books; but I can ascend to a much higher antiquity, and tell you what our fathers have done for nine thousand years; I mean their institutions, their laws, and their most brilliant achievements.”
Donelly writes (extracts)
“And here we find that the Flood that destroyed this land of the gods was the Flood of Deucalion, and the Flood of Deucalion was the Flood of the Bible, and this, as we have shown, was “the last great Deluge of all,” according to the Egyptians, which destroyed Atlantis.
The mythology of Greece is really a history of the kings of Atlantis. The Greek heaven was Atlantis. Hence the references to statues, swords, etc., that fell from heaven, and were preserved in the temples of the different states along the shores of the Mediterranean from a vast antiquity, and which were regarded as the most precious possessions of the people. They were relics of the lost race received in the early ages. Thus we read of the brazen or bronze anvil that was preserved in one city, which fell from heaven, and was nine days and nine nights in falling; in other words, it took nine days and nights of a sailing-voyage to bring it from Atlantis.”
Plato says (“Dialogues,” Timæus, vol. ii., p. 533): “Oceanus and Tethys were the children of Earth and Heaven, and from these sprung Phorcys, and Chronos, and Rhea, and many more with them; and from Chronos and Rhea sprung Zeus and Hera, and all those whom we know as their brethren, and others who were their children.”
In other words, all their gods came out of the ocean; they were rulers over some ocean realm; Chronos was the son of Oceanus, and Chronos was an Atlantean god, and from him the Atlantic Ocean was called by tho ancients “the Chronian Sea.” The elder Minos was called “the Son of the Ocean:” he first gave civilization to the Cretans; he engraved his laws on brass, precisely as Plato tells us the laws of Atlantis were engraved on pillars of brass.
Uranos was deposed from the throne, and succeeded by his son Chronos. He was called “the ripener, the harvest-god,” and was probably identified with the beginning of the Agricultural Period. He married his sister Rhea, who bore him Pluto, Poseidon, Zeus, Hestia, Demeter, and Hera. He anticipated that his sons would dethrone him, as he had dethroned his father, Uranos, and he swallowed his first five children, and would have swallowed the sixth child, Zeus, but that his wife Rhea deceived him with a stone image of the child; and Zeus was conveyed to the island of Crete, and there concealed in a cave.
Hercules dwelt on the island of “Erythea, in the remote west, beyond the Pillars of Hercules.” Hercules took a ship, and after encountering a storm, reached the island and placed himself on Mount Abas. Hercules killed Geryon, stole the cattle, put them on the ship, and landed them safely, driving them “through Iberia, Gaul, and over the Alps down into Italy.” (Murray’s “Mythology,” p. 257.) This was simply the memory of a cattle raid made by an uncivilized race upon the civilized, cattle-raising people of Atlantis.
NOT alone were the gods of the Greeks the deified kings of Atlantis, but we find that the mythology of the Phœnicians was drawn from the same source. For instance, we find in the Phœnician cosmogony that the Titans (Rephaim) derive their origin from the Phœnician gods Agrus and Agrotus. This connects the Phœnicians with that island in the remote west, in the midst of ocean, where, according to the Greeks, the Titans dwelt.
According to Sanchoniathon, Ouranos was the son of Autochthon, and, according to Plato, Autochthon was one of the ten kings of Atlantis. He married his sister Ge. He is the Uranos of the Greeks, who was the son of Gæa (the earth), whom he married. The Phœnicians tell us, “Ouranos had by Ge four sons: Ilus (El), who is called Chronos, and Betylus (Beth-El), and Dagon, which signifies bread-corn, and Atlas (Tammuz?).” Here, again, we have the names of two other kings of Atlantis. These four sons probably represented four races, the offspring of the earth. The Greek Uranos was the father of Chronos, and the ancestor of Atlas. The Phœnician god Ouranos had a great many other wives: his wife Ge was jealous; they quarrelled, and he attempted to kill the children he had by her. This is the legend which the Greeks told of Zeus and Juno. In the Phœnician mythology Chronos raised a rebellion against Ouranos, and, after a great battle, dethroned him. In the Greek legends it is Zeus who attacks and overthrows his father, Chronos. Ouranos had a daughter called Astarte (Ashtoreth), another called Rhea. “And Dagon, after he had found out bread-corn and the plough, was called Zeus-Arotrius.”
We find also, in the Phœnician legends, mention made of Poseidon, founder and king of Atlantis.
Chronos gave Attica to his daughter Athena, as in the Greek legends. In a time of plague be sacrificed his son to Ouranos, and “circumcised himself, and compelled his allies to do the same thing.” It would thus appear that this singular rite, practised as we have seen by the Atlantidæ of the Old and New Worlds, the Egyptians, the Phœnicians, the Hebrews, the Ethiopians, the Mexicans, and the red men of America, dates back, as we might have expected, to Atlantis.
“Chronos visits the different regions of the habitable world.”
He gave Egypt as a kingdom to the god Taaut, who had invented the alphabet. The Egyptians called him Thoth, and he was represented among them as “the god of letters, the clerk of the under-world,” bearing a tablet, pen, and palm-branch.
This not only connects the Phœnicians with Atlantis, but shows the relations of Egyptian civilization to both Atlantis and the Phœnicians.
There can be no doubt that the royal personages who formed the gods of Greece were also the gods of the Phœnicians. We have seen the Autochthon of Plato reappearing in the Autochthon of the Phœnicians; the Atlas of Plato in the Atlas of the Phœnicians; the Poseidon of Plato in the Poseidon of the Phœnicians; while the kings Mestor and Mneseus of Plato are probably the gods Misor and Amynus of the Phœnicians.
Sanchoniathon tells us, after narrating all the discoveries by which the people advanced to civilization, that the Cabiri set down their records of the past by the command of the god Taaut, “and they delivered them to their successors and to foreigners, of whom one was Isiris (Osiris), the inventor of the three letters, the brother of Chua, who is called the first Phœnician.” (Lenormant and Chevallier, “Ancient History of the East,” vol. ii., p. 228.)
This would show that the first Phœnician came long after this line of the kings or gods, and that he was a foreigner, as compared with them; and, therefore, that it could not have been the Phœnicians proper who made the several inventions narrated by Sanchoniathon, but some other race, from whom the Phœnicians might have been descended.
And in the delivery of their records to the foreigner Osiris, the god of Egypt, we have another evidence that Egypt derived her civilization from Atlantis.
Max Müller says:
“The Semitic languages also are all varieties of one form of speech. Though we do not know that primitive language from which the Semitic dialects diverged, yet we know that at one time such language must have existed. . . . We cannot derive Hebrew from Sanscrit, or Sanscrit from Hebrew; but we can well understand bow both may have proceeded from one common source. They are both channels supplied from one river, and they carry, though not always on the surface, floating materials of language which challenge comparison, and have already yielded satisfactory results to careful analyzers.” (“Outlines of Philosophy of History,” vol. i., p. 475.)
There was an ancient tradition among the Persians that the Phœnicians migrated from the shores of the Erythræan Sea, and this has been supposed to mean the Persian Gulf; but there was a very old city of Erythia, in utter ruin in the time of Strabo, which was built in some ancient age, long before the founding of Gades, near the site of that town, on the Atlantic coast of Spain. May not this town of Erythia have given its name to the adjacent sea? And this may have been the starting-point of the Phœnicians in their European migrations. It would even appear that there was an island of Erythea. In the Greek mythology the tenth labor of Hercules consisted in driving away the cattle of Geryon, who lived in the island of Erythea, “an island somewhere in the remote west, beyond the Pillars of Hercules.” (Murray’s “Mythology,” p. 257.) Hercules stole the cattle from this remote oceanic island, and, returning drove them “through Iberia, Gaul, over the Alps, and through Italy.” (Ibid.) It is probable that a people emigrating from the Erythræan Sea, that is, from the Atlantic, first gave their name to a town on the coast of Spain, and at a later date to the Persian Gulf–as we have seen the name of York carried from England to the banks of the Hudson, and then to the Arctic Circle.
The builders of the Central American cities are reported to have been a bearded race. The Phœnicians, in common with the Indians, practised human sacrifices to a great extent; they worshipped fire and water, adopted the names of the animals whose skins they wore–that is to say, they had the totemic system–telegraphed by means of fires, poisoned their arrows, offered peace before beginning battle, and used drums. (Bancroft’s “Native Races,” vol. v., p. 77.)
The extent of country covered by the commerce of the Phœnicians represents to some degree the area of the old Atlantean Empire. Their colonies and trading-posts extended east and west from the shores of the Black Sea, through the Mediterranean to the west coast of Africa and of Spain, and around to Ireland and England; while from north to south they ranged from the Baltic to the Persian Gulf. They touched every point where civilization in later ages made its appearance. Strabo estimated that they had three hundred cities along the west coast of Africa. When Columbus sailed to discover a new world, or re-discover an old one, he took his departure from a Phœnician seaport, founded by that great race two thousand five hundred years previously. This Atlantean sailor, with his Phœnician features, sailing from an Atlantean port, simply re-opened the path of commerce and colonization which had been closed when Plato’s island sunk in the sea. And it is a curious fact that Columbus had the antediluvian world in his mind’s eye even then, for when he reached the mouth of the Orinoco he thought it was the river Gihon, that flowed out of Paradise, and he wrote home to Spain, “There are here great indications suggesting the proximity of the earthly Paradise, for not only does it correspond in mathematical position with the opinions of the holy and learned theologians, but all other signs concur to make it probable.”
Sanchoniathon claims that the learning of Egypt, Greece, and Judæa was derived from the Phœnicians. It would appear probable that, while other races represent the conquests or colonizations of Atlantis, the Phœnicians succeeded to their arts, sciences, and especially their commercial supremacy; and hence the close resemblances which we have found to exist between the Hebrews, a branch of the Phœnician stock, and the people of America.
Upon the Syrian sea the people live
Who style themselves Phœnicians. . . .
These were the first great founders of the world—
Founders of cities and of mighty states–
Who showed a path through seas before unknown.
In the first ages, when the sons of men
Knew not which way to turn them, they assigned
To each his first department; they bestowed
Of land a portion and of sea a lot,
And sent each wandering tribe far off to share
A different soil and climate. Hence arose
The great diversity, so plainly seen,
‘Mid nations widely severed.
Dyonysius of Susiana, A.D. 3