Cognomen Murdo (Murdo 
, 默多, مردو 
) , across the world, is a rare last name. The family name Murdo is habitual in Iraq, where it is a rare surname, Israel, and the United Kingdom, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Iraq, Indonesia, and Israel. Also, Murdo is the forename as well as the last name.