Madai

Madai one of seven sons of Japheth listed in the bible.

Gen 10:2  The sons of Japheth; Gomer, and Magog, and Madai, and Javan, and Tubal, and Meshech, and Tiras. 

1Ch 1:5  The sons of Japheth; Gomer, and Magog, and Madai, and Javan, and Tubal, and Meshech, and Tiras. 

According to the Book of Jubilees (10:35-36), Madai had married a daughter of Shem, and preferred to live among Shem's descendants, rather than dwell in Japheth's allotted inheritance beyond the Black Sea; so he begged his brothers-in-law, Elam, Asshur and Arphaxad, until he finally received from them the land that was named after him, Media.

Another line in Jubilees (8:5) states that a daughter of Madai named Milcah (Aramaic: Melkâ) married Cainan, who is an ancestor of Abraham also mentioned in the Septuagint version of Genesis and in the Gospel of Luke (3:36).