According to John Tvedtnes, among the Nephites, we find that there were clear-cut tribal distinctions. For example, though the Anti-Nephi-Lehies (people of Ammon) were converted to the Nephite religion and came to live with the Nephites, yet they were not left to intermingle with the rest of the people. Rather, they were given a special territory named Jershon (and later Melek). That they remained separate from the main Nephite body is indicated by the statement that they continued to be called by the name of their mentor, Ammon, “ever after” (Alma 27:26-27). [John A. Tvedtnes, “Book of Mormon Tribal Affiliation and Military Castes,” in Warfare in the Book of Mormon, F.A.R.M.S., p. 303]
Geographical Theory Map: Alma 27:14-26 Ammon & Converts Depart Toward Zarahemla--Ammon Meets Alma (14th Year)
People of Ammon Go to Jershon (14th Year)
Alma 27:31 Geographical [Theory Map] The Landing and Migration of the People of Zarahemla