The descendants of Nephi, son of Lehi, were known throughout the Book of Mormon as Nephites. Into the Nephite stream were added the descendants of other individuals, including Jacob, Joseph, and Zoram. Nephi’s brother, Jacob, describes the genealogical flow.
Now the people which were not Lamanites were Nephites; nevertheless, they were called Nephites, Jacobites, Josephites, Zoramites, Lamanites, Lemuelites, and Ishmaelites.
But I, Jacob, shall not hereafter distinguish them by these names, but I shall call them Lamanites that seek to destroy the people of Nephi, and those who are friendly to Nephi I shall call Nephites, or the people of Nephi, according to the reigns of the kings.