According to most sources, his sister (and some say former lover/mother of Mordred) was Morgan le Fey.
king Arthur will be someone who is worthy and brave it could even be you or me any one
Yes his older brother
Well, it's a fact that King Arthur was an actual person, however, his power might have been exaggerated. But yes, the King of England did meet King Arthur.
he didnt have any
There have been hundreds of books about King Arthur throughout the years. I have included a link for you in the related links below. You will find a list of King Arthur books, from old to new.
As any daughter of Zeus would be a sister to Athena, yes.
Arthur had the knights of the round table and sir lancelot
his knights of round table
yes
no they didnt
He doesn't have any sisters, but he does have a brother called Matthew
Nope! She's an only child. =) -Ellsion