Now the sons of Keturah, Abraham's concubine: she bore Zimran, and Jokshan, and Medan, and Midian, and Ishbak, and Shuah. And the sons of Jokshan; Sheba, and Dedan.
Read Chapter 1
George Leo Haydock
AD 1849
Concubine. She was his lawful wife, but of an inferior degree, and such were called concubines. (Challoner)
She has the title of wife, Genesis xxv. 1.
And the sons of Dadan, seems to be copied from Genesis, as the addition is not found in many Latin manuscripts, no more than in the Hebrew or Septuagint. (Calmet)