Numbers 26:12 lists this clan (with definite article) among the families of Simeon during the wilderness census. Clan designations (gentilic adjectives) functioned like surnames in ancient Israel, marking lineage and land inheritance rights. The census in Numbers 26 follows the plague that killed 24,000 Israelites; it's both a military muster and a record of who survived to enter Canaan. The Nemuelites were part of Simeon, a tribe that would later be absorbed into Judah, their identity preserved in genealogical memory even as their territorial distinctiveness faded.