Here is the history of the beginning of the world and how we and the dragons came to be. I will also post up the current hierarchy of the dragon lords which includes my father Fafnir within another post.
In the Babylonian myth the the first dragon was Yaldabaoth, although is also called Tiamat so Yaldabaoth grown up and made some more like her Nagamat, Kaliyat, Orkus, Tarasque and Serpens among others..., that was what Micael Green says, he translated from an old script. Tiamat was a Babylonian Dragon being personification of the sea mainly(salt water), and portrayed as the mother of all Dragons and daugther of Chaos; she appears in the creation myth, Enuma Elish:Tiamat lived in the primordial chaos that existed before the creation of the world. She mingled with Apsu ( a personification of fresh water), and the first generation of gods was born.One of these gods, Enki or Ea killed Apsu.Tiamat wanted to avenge Apsu by destroying the gods. She gathered an army of monsters and 11 Dragons.The older gods were so terrified when they saw Tiamat, and her army, that they accepted the offer of the young god Marduk. He offered to kill Tiamat on the condition that his supremacy was recognized. Marduck killed Tiamat in battle and used her body to make the universe. He used the blood of Kingu, leader of Tiamat's army and her second husband, to make mankind.