Cognomen William Tomas (William Tomas 
) , in the world, is an extremely rare last name. The surname William Tomas is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. Predominantly, William Tomas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| William Tomas | Costa Rica, Chile, Ecuador, Peru, Venezuela |