Cognomen Santxo (Sancho 
, Santxo 
) , in the entire world, is a common surname. The cognomen Santxo is characteristic of Costa Rica, where it is a common surname, Spain, where it is quite a common surname, and Portugal. In absolute terms, this name is the most popular in Spain, Costa Rica, and Philippines. Likewise, Santxo is the forename as well as the last name.