I think 6 r 7, It depends when oder if Du count Wrath. Tohrment, Rhage, Zsadist, Phury, Vishous, Butch. Currently there only 5, because Phury left. Du have to read all 10 Bücher to understand, good luck.
Wrath ( still a brother read Lover at Last for proof), Tohr, Phury, Zsadist, Butch,Rhage, Vishous, Spoiler Quinn. Also Murhder is still alive just AWOL-so 9.