According to the Hebrew Bible, Midian is the fourth son of Abraham by Keturah, the woman Abraham married after Sarah's death. His brothers are Zimran, Jokshan, Medan, Ishbak and Shuah.
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." 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.
It is unclear whether this figure is connected to the Midianite people found in later portions of the Hebrew scriptures.