Keturah: Incense, the wife of Abraham, whom he married probably after Sarah's
death
(Genesis 25:1-6) by whom he had six sons, whom he sent away into the
east country. Her nationality is unknown. She is styled "Abraham's
concubine"
(1 Chronicles 1:32) Through the offshoots of the Keturah line
Abraham became the "father of many nations."