The Graeae (English translation: "old women", "gray ones", or "gray witches", alternatively spelled Graiai, Graiae, Graii), were three sisters who shared one eye and one tooth among them.
The Gray sisters
Cause the greek were the ones that invented it
There are many gods in Greek mythology, but the main ones are the 12 Olympian gods who ruled from Mount Olympus.
No
In Greek mythology, Zeus is typically depicted with a white or gray beard.
It is fiction, even though the gods mentioned in the book were real gods in Greek mythology, and some of the stories in the book are similar to ones in Greek mythology.
It depends on which country's mythology. I'm only knowledgeable in Greek and Roman myths, my specialty being Greek ones.
The Erinyes (angry ones), also called Eumenides (gracious ones).
Athena, the Greek goddess of wisdom, had gray eyes.
Click link below, to see the Family tree of the Greek gods! The ones in green and the ones above that level are the elder gods.
The Kindly Ones were the Furies. They supervised the torments that were given to the wicked in Tartarus.
It depends on the desire of influence and social situation of the person concerned.