"salty, briny," 1510s, from Dutch brak "brackish," probably from Middle Dutch brak "worthless," a word also used in commercial trade and which also made its way into early Modern English.
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for brack
She was in turn succeeded by Mr. Brack Cabell the following year.
You seem to have made a particularly lively night of it at your rooms, Judge Brack.
It's only a matter of form you know—Judge Brack assured me of that.
And Brack had all sorts of arrangements to make—so Eilert read to me.
In order to hear a little of your liveliness at first hand, Judge Brack.