In Ether 2:1 we find that Jared and the brother of Jared led their followers "into the valley which was northward, and the name of the valley was Nimrod." According to Hugh Nibley, it's very interesting that in the north end of Mesopotamia all the places bear the name Nimrod. There's Bir Nimrod and dozens of Nimrod names up north in Mesopotamia where you go through. Then you go east and what do you do? You cross many waters. [Hugh W. Nibley, Teachings of the Book of Mormon, Semester 4, p. 253]