The place name "嵩明县" is formed by combining the character "嵩", which refers to Mount Song (嵩山), a sacred mountain in Henan Province, with "明", denoting the Ming Dynasty, and appending "县", meaning county, to indicate an administrative division; this name originates from historical migration during the Ming Dynasty when settlers from the Mount Song region established this area in Yunnan Province, thus creating a toponym that merges geographical and dynastic references.