What is the name of Julius Caesar's wife?

What is the name of the predictor of the future in the play who tells Caesar to beware of the ides of March?

Who is the man with the lean and hungry look in the play?

WHo is the third along with Antony and Octavius who doesn't quite impress Antony?

What is the name of the battlefield upon which both Cassius and Brutus lose their lives?