John II Komnenos or Comnenus (Greek: Ίωάννης Βʹ Κομνηνός, Iōannēs II Komnēnos; September 13, 1087 – April 8, 1143) was Byzantine Emperor from 1118 to 1143. Also known as "John the Beautiful" or "John the Good" (Kaloïōannēs), he was the eldest son of Emperor Alexios I Komnenos and Irene Doukaina and the second emperor to rule during the Komnenian restoration of the Byzantine Empire.