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.
Sources Fara, G. F. De Rebus Sardois. Manno, Giuseppe (1835). Storia di Sardegna. P.M. Visaj.