His widowed mother Flora Abbott ("née" Butler) met and married John Sengstacke, an American mixed-race man of unusual background who had recently come to the US from Germany. His parents were Tama, a freed slave woman of African descent, and her husband Herman Sengstacke, a German sea captain who had a regular route from Hamburg to Savannah. In the Georgia port city in 1847, Herman saw a slave sale. He was so distressed he bought the freedom of Tama, a young woman from West Africa. They married in Charleston, South Carolina, before returning to Georgia, where their interracial marriage was prohibited. Their mixed-race son John was born the next year and a daughter in 1848. Tama died soon after their daughter was born, and Herman took the children back to Germany to be raised by family.