What ties does Zephaniah Kingsley Jr. have with Haiti and Cuba? Why is the name Anna Madginine Jai tied to Cuba and Jacksonville?

What ties does Zephaniah Kingsley Jr. have with Haiti and Cuba? Why is the name Anna Madginine Jai tied to Cuba and Jacksonville?
Zephaniah Kinglsey Jr was a planter, merchant, slave trader and Quaker who owned and created several plantations in Florida, which was at his time a Spanish colony. Even though Kingsley Jr was a white man, he was lenient slave owner and even engaged in marriage with them. He had four wives, all of who were colored.
The plantations owned by Kingsley Jr were located in what is today known as Jacksonville. His first wife was...