Surname التو (Alto 
, التو 
, Aalto 
) , across the world, is a common last name. The family name التو is habitual in Northern Europe, particularly Finland, where it is a common surname, Estonia, where it is quite a rare surname, and Sweden. Not in comparison with a country's population, it is commonest in Finland, Philippines, and Mexico. Very seldom, التو is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Alto | Mexico, Tanzania, Finland, United States, Philippines |
| التو | Sudan, Egypt, Saudi Arabia |
| Aalto | Brazil, Sweden, Finland, United States, Spain |