Lemuelites (/ˈlɛm.juːl.aɪts/) were a subdivision of Lamanites, a purported people of the ancient Americas referenced in the Book of Mormon. To save time and prevent confusion those who were sought to destroy Nephi's people were often just called Lamanites.
Origins
In the journey in the wilderness, there is a reference to Lemuel, older brother of Nephi younger brother of Laman, marrying one of the daughters of Ishmael. Also in the Wilderness the wives of the Lehi group bear children; There we have the beginnings of the Lemuel's family, though not referenced as having been called Lemuelites until the ministry of Jacob.
References
Lemuelites Wikipedia(Text) CC BY-SA