Julianus ben Sabar
Julianus ben Sabar (also known as Julian or Julianus ben Sahir and Latinized as Iulianus Sabarides) was a leader of the Samaritans, seen widely as being the Taheb who led a failed revolt against the Byzantine Empire during the early 6th century. 

In 529 Julianus led a revolt against the Byzantine Empire ruled by Justinian I, because of legislation outlawing the Samaritan religion, according to Procopius, though Cyril of Scythopolis claimed it was because of tension with Christians. 

Julianus declared himself King of Israel, taking Jeroboam as his model, and led a Samaritan army to ravage the cities of Scythopolis, Caesarea Maritima, Neapolis, Bethlehem, and Emmaus. By 530 he had succeeded in capturing virtually all of Samaria. The revolt was marked by large scale slaughter of Christians and destruction of churches.

Justinian enlisted the help of the Ghassanids, and by 531 the rebellion had been put down. Julianus himself was beheaded according to Theophanes the Confessor. Tens of thousands of Samaritans were killed and enslaved and many were sold as slaves throughout the Middle East. Others were sold as far away as Sassanid Persia, where their descendants would be included in the Persian invasion of the Levant some eighty-five years later.

Julianus' revolt has been compared to the Bar Kokhba Revolt 400 years prior. Both revolts against foreign imperial occupation led by a self-proclaimed Messiah/Taheb were initially successful, only to be later brutally quashed. However, unlike the Jews, the Samaritan community never recovered from their ethnic cleansing, and were further reduced to a minority in Samaria after persecutions in the late Middle Ages by the Mamluks.

References

Medieval Samaritan people
6th-century Byzantine people
Byzantine rebels
People executed by decapitation
Executed Byzantine people
6th-century monarchs in the Middle East
6th-century executions by the Byzantine Empire
Year of birth unknown