Jokshan in Wikipedia

Jokshan ("an offense", "hardness", or "a knocking"); most probably Josephus' Jazar.[1] According to the Bible he was the second son of Abraham and his concubine[2] Keturah, whom he wed after the death of Sarah.[3] Jokshan had five other brothers: Zimran, Medan, Midian, Ishbak and Shuah [4]; as well as two half brothers: Ismael and Isaac. Apparent and approximate emigration patters of Abraham’s children to Katurah, excepting those of whom insufficient is known to draw a conclusion. Josephus records that "Abraham contrived to settle them in colonies; and they took possession of Troglodytis and the country of Arabia the Happy, as far as it reaches to the Red Sea."[5] Abraham in all probability, tried to keep them apart from Isaac to avoid conflict while fulfilling God's commission to spread out and inhabit the globe.[6][7][8] Jokshan became the father of Sheba and Dedan. Dedan had three sons, named Asshurim, Letushim, and Leummim.[9]