See, I knew about three questions after I started that I'd made a poor choice!
EH IQs:
1. No, I am not Clytemenestra or however she spelled it
2. Staggeringly stumped. Defended granaries? This sounds like a John Steinbeck play.
3. Is this Wrong Way Corrigan? I suppose the likeliest answer would be Charles Lindbergh but I don't remember him crossing America. Then again, the whole thing with Corrigan was that he pretended to cross American but actually went across the Atlantic, so I have no idea. Likely Stumped.
CIAS IQs:
1. No, I am not Cassandra
2. No, I am not whoever-the-heck-this-is from (I think) Blake's Seven?
3. YES, I am Cleopatra, aka Cleopatra VII Philopator, Queen of Egypt, her brother's wife, Caesar's lover, Marc Antony's wife/lover, and suicide-by-asp doer.
FWIW, the answers to your final two questions, EH, were Died before 1500 and Not originally from the Western Hemisphere. Well done, CIAS!