Xisuthrus

Chaldean Flood Myth:

The god Chronos warned Xisuthrus (the equivalent of Utnapishtim in the Sumerian Flood Myth) of a coming flood, ordered him to write a history, and told him to build a vessel (5 stadia by 2 stadia) for himself, his friends and relations, and all kinds of animals, all of which he did. After the flood had come and abated somewhat, he sent out some birds, which returned. Later, he tried again, and the birds returned with mud on their feet. On the third trial, the birds didn't return. This meant they had found dry earth to live on. He disembarked and, with his wife, daughter, and pilot, offered sacrifices to the gods. Those four were made immortal to live with the gods.

Many ancient flood stories share similarities to the one above: Hebrew: Noah, Egyptian Naunet, Hindu: Manu, China: Nuwa, Sumerian: Atra-Hasis, Babylonian: Utnapishtim, Makunaima, Xisuthrus, Greek: Deucalion, Toltec toptlipetlocali

They generally show the ancestor of all human beings, as this character (and sometimes a female or male companion, or family, and often animals) survives the great deluge of mankind in the form of a flood, and is left to repopulate the earth.