1890, from French brouhaha (15c.), said by Gamillscheg to have been, in medieval theater, "the cry of the devil disguised as clergy." If it has an etymology, it is perhaps from Hebrew barukh habba' "blessed be the one who comes," used on public occasions (as in Psalm cxviii).
brother-in-law
brotherliness
brotherly
brougham
brought
brouhaha
brow
browbeat
brown
Brown Shirt
brown-bag