Globally, Syjuco-Duena (Syjuco-Duena 
) is an extremely rare unknown gender first name. Much more frequently, Syjuco-Duena is the last name as well as the forename. Parts of the name also exists independently as a last name Syjuco, and a last name Duena.
| VARIANT | COUNTRY |
|---|---|
| Syjuco-Duena | United States |