They come from beliefs of kings or rulers
Greek, the origin of the word "pan" (all) and "theon" (gods) is Greek too.
they are all brothers and sisters because they come from the same dad and mom.
Yes, there are stories were the Greek gods come down to a mortal. Usually this happened because the mortal angered the gods.
With the Greek goddesses and gods.
The Greek gods were worshiped in all ancient Greek cities.
the Greeks belived that the gods were born in mount olyimpus
This is not an opinion , but historical fact nimrod and his mother and wife . Calmed to be all these gods .
With the Greek goddesses and gods.
no they are't real at all
Not all of the Greek Gods and Goddesses
Greek Mythology does not come with a start date.
The Greek gods were collectively known as the Pantheon, which in Greek means all gods.