Last name Regeiro (Regeiro 
) , around the globe, is a very rare surname. The cognomen Regeiro is habitual in Latin America and the Caribbean, particularly Argentina, where it is a very rare surname, Venezuela, and Chile, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Argentina, Mexico, and the United States. Very seldom, Regeiro is the forename as well as the last name.