Ohannes Tunçboyacıyan (a.k.a. Onno Tunç; Armenian: Օհաննես Թունչբոյաջյան ; December 20, 1948 - January 14, 1996) was a leading Armenian-Turkish musician, working mainly as a composer and an arranger. Tunç also played bass guitar and occasionally double bass, contributing to the albums of several musicians. He was the elder brother of musician Arto Tunçboyacıyan.
Ohannes Tunçboyacıyan lived to be 47 years old. 
The musician was born in late 1948, and died in early 1996. 1996 - 1948 is 48 years, however he died before his birthday, so he was only 47. 