Who is Jacob's brother?

Jacob's brother's name is William.

William

Harriet's younger brother who finds it difficult to live the life of a slave. He is sent with Harriet to Dr. Flint's and observes with disgust the man's attentions toward his sister. He is smart, bold, and independent. When he is eventually purchased by Mr. Sands, he travels north with him until he decides to run away and join the abolitionists, fearing Mr. Sands would never set him free. He spends some time on a whaling voyage in New Bedford and then is reunited with Harriet in New York. After a failed attempt to open an anti-slavery reading room in Rochester, William moves to California and takes Benny with him.