Joseph Hopkinson was the son of Franklin's political and personal associate, Francis Hopkinson. A lawyer like his father, he was equally active in the cultural life of Philadelphia. He served as Secretary of the Pennsylvania Academy of the Fine Arts and was one of the Secretaries of the American Philosophical Society.
An accomplished amateur poet, he composed the verses of "Hail, Columbia" (1798) which was the first national anthem of the United States.
Rufus Griswold, The Poets and Poetry of America, NY : J. Miller (1872), was the source of this information.