Meaning: Its source is Munro, a Scots Gaelic name meaning "Mouth of the river Rotha, in Ireland."

Nickname For: Monroe

Narrative: This originated as a surname identifying those who lived near this river's mouth. It has been given to boys in America as a personal name often in honor of the fifth U.S. President, James Monroe (1758-1831), whose Monroe Doctrine forbidding foreign interference in the Americas did much to define the new country's place in the world.