Was the character portrayed by Morgan Freeman in the movie Amistad historical?I'm not sure please help.

The answer to this is no.  The character that Morgan
Freeman plays in this movie was not a real person.  Morgan Freeman plays a character
named Theodore Joadson in this film.  The character, in the film, is portrayed as a
leading abolitionist (he is a freed slave) in the film.  There was never any such
person.

This is not uncommon in films that are based on
historical events.  Writers tend to create characters when there are not any real life
characters who embody the ideas or characteristics that the writers want to show.  This
is one of those cases.