| Gonario II | |
| Succession: | Judge/King of Arborea |
| Reign: | 1116–1131 |
| Predecessor: | Comita I |
| Birth Date: | 1090 |
| Spouse: | Eleanor of Arborea (daughter of Comita I of Arborea) |
| Issue: | Constantine I, King of Arborea Eleonora Comita II/III, King of Arborea (possibly) |
| House: | Lacon-Gunale (Serra branch) |
Gonario or Gonnario II (born c. 1090) was the Judge of Arborea circa 1116. He is known to have been a scion of the House of Serra and married Elena, the heiress of Comita I of the Lacon-Zori. He left behind a daughter, Elena, and a son, Constantine I.