Alexios Komnenos, latinised as Alexius Comnenus (Greek: Ἀλέξιος Κομνηνός), was the eldest son of the Byzantine emperor John II Komnenos and his wife Eirene of Hungary. He was born in February 1106 at Balabista in Macedonia, was made co-emperor with his father at 16 or 17 years of age and died on 2 August 1142 [1] at Attalia, Pamphylia. He was an elder brother of the emperor Manuel I Komnenos, and had a twin sister, Maria Komnene (plus other siblings).