Fraternal

Definition of Fraternal

Brotherly; relating or belonging to a fraternity or an association of persons formed for mutual aid and benefit, but not for profit. In re Mason Tire & Rubber Co., 56 App.D.C. 170, 11 F.2d 556, 557.

That's the definition of Fraternal in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.