Surname Uasilaa (Uasilaa 
) , all around the world, is an extremely rare cognomen. The surname Uasilaa is habitual in New Zealand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Uasilaa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Uasilaa | New Zealand, United States |