From where did the term "Jim Crow" originate?

Congressman James Crow, who implemented a series of laws regulating the segregation of blacks and whites a song called "Jump Jim Crow" by a white man who popularized minstrel shows an escaped slave named Jim who was known for using crows as a method of delivering messages to other slaves

the author Jim Crow, whose famous children's novel laid the groundwork for the Montgomery Bus Boycott