Brother

"There are only two of us left, Brother. But only one will survive."

- Feral in the arena of the Crucible

Brother was a title given to all members of the Nightbrothers, a society of male Dathomirian Zabrak subservient to the Nightsisters.

Usage
On the misty world of Dathomir, the title of "Brother" was used, regardless of actual kinship, as a form of address for a Nightbrother, alone or followed by his first name.

Notable clan brothers

 * Brother Viscus
 * Brother Feral
 * Brother Maul
 * Brother Savage

Behind the scenes
This title first appeared in January 2011 in "Monster", the thirteenth episode of the Star Wars: The Clone Wars television series' third season.

The use of "Brother" as a form of address is similar to what happens in the real life religious communities or churches.