Cognomen Sirlo (Sirlo 
) , around the globe, is a very rare surname. The last name Sirlo is characteristic of Czechia, where it is a rare surname, the United States, where it is an extremely rare surname, and India. Likewise, Sirlo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sirlo | Philippines, Czechia, Brazil, United States, India |