According to the Bible, Medan (Hebrew: מְדָ֥ן "contention; to twist, conflict"); also spelt Madan was the third son of Abraham

Abraham

Abraham , whose birth name was Abram, is the eponym of the Abrahamic religions, among which are Judaism, Christianity and Islam...

, the patriarch

Patriarch

Originally a patriarch was a man who exercised autocratic authority as a pater familias over an extended family. The system of such rule of families by senior males is called patriarchy. This is a Greek word, a compound of πατριά , "lineage, descent", esp...

 of the Israelites, and Keturah

Keturah

According to the Hebrew Bible, Keturah or Ketura was the woman whom Abraham, the patriarch of the Israelites, married after the death of his wife, Sarah. Keturah bore Abraham six sons, Zimran, Jokshan, Medan, Midian, Ishbak, and Shuah....

 whom he wed after the death of Sarah

Sarah

Sarah or Sara was the wife of Abraham and the mother of Isaac as described in the Hebrew Bible and the Quran. Her name was originally Sarai...

. Medan had five brothers, Zimran

Zimran

Zimran , also known as Zambran. was according to the Hebrew Bible the first son of Abraham, the patriarch of the Israelites, and Keturah whom he wed after the death of Sarah...

, Jokshan

Jokshan

Jokshan ; most probably Josephus' Jazar. According to the Bible he was the second son of Abraham and his concubine Keturah, whom he wed after the death of Sarah...

, Midian

Midian (son of Abraham)

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....

, Ishbak

Ishbak

Ishbak , also spelt Jisbak and Josabak. According to the Bible he was the fifth son of Abraham, the patriarch of the Israelites, and Keturah whom he wed after the death of Sarah...

, and Shuah

Shuah

Shuah , also known as Sous, was, according to the Bible, the sixth son of Abraham, the patriarch of the Israelites, and Keturah whom he wed after the death of Sarah...

.
Josephus tells us 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

Isaac

Isaac as described in the Hebrew Bible, was the only son Abraham had with his wife Sarah, and was the father of Jacob and Esau. Isaac was one of the three patriarchs of the Israelites...

 to avoid conflict while fulfilling God's commission to spread out and inhabit the globe. Little else is known about him.

There is no known connection to the Madan people of Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

and Iraq.