Francis James Grimké (October 10, 1850– October 11, 1937) was an American Presbyterian minister in Washington, DC who was prominent in working for equal rights for African Americans. He was active in the Niagara Movement and helped found the National Association for the Advancement of Colored People (NAACP) in 1909.
Francis Grimké was the second of three sons born to Henry Grimké, a white (European-American) slaveholder of Charleston, South Carolina, and Nancy Weston, an enslaved woman of European and African descent. His father attempted to protect them by willing them to his legitimate son and directing the to be treated as family. The attempt failed.
Two of Henry's sisters, Sarah and Angelina Grimké, who had become abolitionists, moved to the North to join activists there. After learning about their nephews, Angelina and Sarah officially acknowledged the three mixed-race boys as family. The sisters supported the three boys while they were in college, and opened their home to them.Francis Grimké in Wikipedia