Yes, he had one sister and no brothers.
wrote "The Star-Spangled Banner" after observing the British attack on Fort McHenry.
Francis Scott Key was a lawyer, and an amateur author and poet.
Yes, he was married to a woman named Mary Tayloe Llyod(Annapolis) together they had 6 sons and 5 daughters.
yes he was and while he was captured he wrote the star spangled banner