Origin: 1350–1400; (v.) Middle Englishbrawlen, brallen to raise a clamor, quarrel, boast; of uncertain origin; (noun) Middle Englishbraule, brall, derivative of the noun
late 14c., braulen "to cry out, scold, quarrel," probably related to Du. brallen "to boast," or from Fr. brailler "to shout noisily," frequentative of braire "to bray." The noun is mid-15c., from the verb. Related: Brawled; brawling.