Probably from the name of the ancient city of Nineveh in Assyria. According to Greek historians this was the name of the husband of Semiramis and the founder of Nineveh. In actuality he does not correspond to any known Assyrian king, and is likely a composite character named after the city.
People with the name Mareo have a deep inner desire to create and express themselves, often in public speaking, acting, writing or singing. They also yearn to have beauty around them in their home and work environment.