Hannibal was a city located in the state of Missouri.
In 2035, Sherman P. Raymond II, the son of Denise C. Raymond and Brent S. Jay Raymond, was born in this city. (TNG: "The Neutral Zone")
The name of this city was never mentioned in dialog; the name came from the remastered Clare Raymond family tree.
While never stated on-screen, it was also the birth place of Samuel Clemens