"Mc" is a common prefix in names and terms, often indicating "son of" or "descendant of" in various cultures, particularly in Scottish and Irish surnames. For example, the name MacDonald means "son of Donald." It is frequently used in family names to signify lineage. In addition to surnames, "Mc" is also associated with popular brands, such as McDonald's, a global fast-food chain known for its hamburgers and fries. The brand's name reflects its founder, Ray Kroc, who helped expand the original restaurant established by the McDonald brothers.