Person
Najda ibn Amir al-Hanafi
نجدّة بن عامر الحنفي
d. 691 CE
Najda led the moderate Najdat Kharijites, controlled parts of Arabia, declared himself caliph, and was assassinated circa 691.
Significance
Leader of the Najdat Kharijite faction during the Second Fitna
Reputation in tradition
extremist
Stated motivation
Establish Kharijite control and caliphate
Sources: Wikipedia and classical Islamic biographical literature compiled by automated researchers. Every page is being continuously refined — if something looks off, please check back in a few days.