Last name Cayetan (Cayetan 
) , throughout the world, is a very rare surname. The cognomen Cayetan is habitual in Latin America and the Caribbean, particularly Venezuela, where it is a very rare surname, Mexico, where it is an extremely rare surname, and Argentina. Not in comparison with a country's population, it is commonest in Venezuela, Mexico, and the United States. Likewise, Cayetan is the forename as well as the last name.