Was Lehi’s son Jacob named after Jacob of old?
Answer: It is not known why Jacob received his Hebrew name. However, it is known that Jacob, son of Lehi, was a descendant of Jacob, son of Abraham and Rebekah.
It is significant to note that Lehi’s oldest children have Egyptian or non-Israelitish names, while those born after Lehi’s prophetic call, have Israelitish names.
Source: 400 Questions and Answers About the Book of Mormon by Susan Easton Black, p. 111.