It is said at the very beginning of House Varela there ancestors where children of the old greek gods that were to earth and created Olympus.

As time passed by the old legend of House Varela was proven true, Where lords and royal's would tell there children stories of there tale.

The Olympians are said to be blessed by the power and the skills with weaponry from the old greek gods.

When King Ares Targaryen II heard of this he tried to conquer Olympus like his ancestors did with westeros and put it under the Targaryen rule trying to make it the eighth kingdom but failed doing so.