Family name Guitas (Guitas 
) , in the entire world, is a very rare cognomen. The surname Guitas is habitual in Portugal, where it is a rare surname, the United States, where it is an extremely rare surname, and the United Kingdom. In absolute terms, this name is the most popular in Portugal, the United States, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Guitas | Brazil, Philippines, United Kingdom, United States, Portugal |