Azura

Azura was the daughter of Adam and Eve according to the Book of Jubilees, an ancient Jewish text considered canonical by some Christian and Jewish churches.
https://en.wikipedia.org/wiki/Book_of_Jubilees.

Azura is also the Arabic word for blue.

Azura comes from the Latin word for blue.

According to Jewish tradition, Azura is the twin sister of the Biblical Abel, and becomes the wife of Seth/Chet, her youngest brother, since Abel died. Cain also had a twin sister that became his wife, Awan.