Constellations have been named in various ways
Most of the constellations got their names from Greek or Latin,the roman empire.The names themselves came ancient human civilization.Orion came from the ancient civilization of Babylon.The constellation Scorpius came from the scorpion king.

*Aquarius, the water bearer, is one of the most famous constellations.It is very faint and is barely visible.It got its name as the water barer of the gods.

*Aquila is the next constellation its name as being “the eagles tale”
The next constellations name is Auriga,the charioteer.It is represented as Neptune,as in Poseidon riseing from the sea.
*Bootes the herdsman is the next constellation is known as the man who drove the Big cart, Big cart in meaning the Big Dipper,it tails the Big Dipper in the night sky.
*Cancer the crab was named after Hera sent a giant crab to distract Hercules while defeating the three headed Hydra.
*Cassiopeia,The queen,Is the mythical queen of the sky in the fall and winter.
*Gemini,the twins,They got their names from being the mythological twins of Helen and Troy.
*Orion the hunter is known very well and is visible,it got its name from being a Greek hunter.
*Scorpius The scorpion came from Latin name as the scorpion king.

http://stardate.org/nightsky/constellations