Cognomen Alto (Alto 
, Alt , Altus 
) , across the world, is a common family name. The family name Alto is habitual in Estonia, where it is quite a common surname, Germany, and Switzerland, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Germany, the United States, and Philippines. Very seldom, Alto is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Alt, Alto | Germany, Philippines, Mexico, United States, Brazil |
| Altus | Germany, Turkey, Mexico, United States, Brazil |
| アルト | Japan |
|
alto of altomünster Irish monk, IE (b. 701) |
|
|
eustace de monte alto Norman noble, GB (b. 1040) |
|
| hugh de monte alto GB (b. 1050) |
|
|
| bernardus de monte alto (b. 1150) |
|
|
| alto arche AT (b. 1854) |
|
|
|
bobby alto American actor (1938-2012), US (b. 1938) |
|
|
attilio alto IT (b. 1937) |
|
| alto pritzl (b. 1915) |
|
|
| jesse alto American poker player, US (b. 1927) |
|
|
| massimiliano alto Italian actor, dub actor and dubbing director, IT (b. 1973) |
|
|
| neal m alto researcher (ORCID 0000-0002-7602-3853) |
|
|
| michelle e alto researcher |
|
|
| alto balo politician |
|
|
| alto von tannstein Abbot of the Benedictine Abbey St. Emmeram, Regensburg |
|
|
| barry alto researcher (ORCID 0000-0001-7054-2081) |
|