Dhu Nuwas
The Christians of Najran were massacred in 524 by the Himyarite king, Yusuf As'ar Dhu Nuwas. The Najranite Christians, like other Southern Arabian Christian communities, had close connections with the ecclesiastical authorities in Byzantium and Abyssinia. They were identified by virtue of their religion as "pro-Axumite" and ""pro-Byzantine"."