Family name Rosalyn-Decha (Rosalyn-Decha 
) , worldwide, is an extremely rare last name. Much more prevalently, Rosalyn-Decha is the forename as well as the last name. Parts of the name also exists independently as a first name Rosalyn, and a first name Decha.
| VARIANT | COUNTRY |
|---|---|
| Rosalyn-Decha | Philippines |