Samuel Charles Blackwell (1823 - 1901). He was born in England, the son of sugar refiner Samuel Blackwell. The father moved his family to the United States in 1832, first living in New York City, and later in New Jersey. The father's interest in social reform was passed on to his children.

Samuel Blackwell was the husband of Antoinette Brown, the first woman ordained in a recognized church in the United States, and prominent speaker in the Abolitionism and Women's Rights Movements. He married Brown at her home in Henrietta, New York in 1853. They later lived in New York City and New Jersey and had seven children (two died young).

His brother, Henry B. Blackwell, was the husband of Lucy Stone, the college friend of Antoinette Brown at Oberlin College. Stone was also an important abolitionist and worker for womens' suffrage.

His sister, Elizabeth Blackwell, was one of the first female graduates of medical schools in the United States and the first to practice medicine.