Yes, Harriet Tubman's niece, Harriet Ross Tubman, was also an abolitionist and suffragist. She was born into slavery in Maryland in 1836, and she escaped to Philadelphia with the help of her aunt in 1850. After the Civil War, she became an active member of the women's suffrage movement. She was a delegate to the National Woman Suffrage Association's convention in 1869, and she was one of the first African American women to vote in the United States. She also worked to improve the lives of African Americans in Philadelphia, and she helped to establish the Harriet Tubman Home for the Aged in 1903.