Baron: Charles Mingus

Wikipedia

.... Nearly as well known as his ambitious music was Mingus' often fearsome temperament, which earned him the nickname "The Angry Man of Jazz." His refusal to compromise his musical integrity led to many on-stage eruptions, exhortations to musicians, and dismissals

allaboutjazz

.... When Mingus moved on to the Four Star label and recorded with his octet in 1946, promoter War Perkins added the "Baron" appellation to sell records and denote Mingus' presumed musical royalty. The stellar addition to Mingus' group was pianist Lady Will Carr, whose work subtly accentutated the more emotional approach of "This Subdues My Passion," her arpeggios fluttering behind the muted brass