Cognomen Santo Tomas (Santo Tomas 
) , all around the world, is a rare surname. The family name Santo Tomas is habitual in Spain, where it is a rare surname, Philippines, where it is a very rare surname, and Chile. Not in comparison with a country's population, the name is most common in Spain, Philippines, and the United States. Likewise, Santo Tomas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Santo Tomas | Peru, Philippines, Dominican Republic, Spain, Ecuador |