Arpachshad

Arpachshad, alternatively spelled Arphaxad or Arphacsad (Hebrew: אַרְפַּכְשַדֿ / אַרְפַּכְשָדֿ, Modern Arpakhshad Tiberian ʾArpaḵšaḏ / ʾArpaḵšāḏ ISO 259-3 ʔarpakšad; Arabic: 'أرفخشذ', Ārfakhshad‎), was one of the five sons of Shem, the eldest son of Noah (Genesis 10:22, 24; 11:10-13; 1 Chron. 1:17-18). Arpachshad's brothers were Elam, Asshur, Lud and Aram; he is an ancestor of Abraham. He is said by Gen. 11:10 to have been born two years after the Flood, when Shem was 100.

Arpachshad's son is called Shelah, except in the Septuagint, where his son is Cainan (קינן), Shelah being Arpachshad's grandson. Cainan is also identified as Arpachshad's son in Luke 3:36 and Jubilees 8:1. The Book of Jubilees additionally identifies Arpachshad's wife as Rasu'aya, the daughter of Susan, who was the son (or daughter in some versions) of Shem's older son Elam. (Arpachshad's mother is named in this source as Sedeqetelebab; for competing traditions on the name of Shem's wife see wives aboard the Ark.)