Definition of Felagus
In Saxon law, one bound for another by oath; a sworn brother. A friend bound in the decennary for the good behavior of another. One who took the place of the deceased. Thus, if a person was murdered, the recompense due from the murderer went to the felagus of the slain, in default of parents or lord.
That's the definition of Felagus in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.