Aiza is a name of Basque Spanish origin. It means cliff or rock and is a spelling variation on Arista, or in Basque, Aritza. The etymological meaning of Aiza (from P.Gmc.*aiza) is "honor". This spelling was found in 1127 in Navarra, Spain. Other variations of the surname are Aza, Ariza and Aixa.
King Inigo Iniguez Aritza (Iņigo Iņiguez Arista -- in Basque, Eneko Aritza) was the first King of Navarra, Spain. The House of Aritza was the ruling house of the Basque Kingdom of Navarra from 824AD to 1234AD.
