Commodore...
Be careful regarding the "First Jack" with the "Don't Tread On Me" motto... It is unlikely that it was in use during the War of 1812 years.
It was flying recently on Old Ironsides because of a directive from the Navy secretary that all active navy ships (including the still-commissioned Constitution) fly it during the war on terrorism.
Interestingly, researchers are not even sure that flag ever existed! It seems our current version dates to the 1880's when apparently an old woodcut was misinterpreted and published in a naval history book... You can google it easily enough and find plenty of info...