Definify.com
Webster 1913 Edition
Brehon
Bre′hon
,Noun.
 [Ir. 
breitheamh 
judge.] An ancient Irish or Scotch judge. 
Brehon laws
, the ancient Irish laws, – unwritten, like the common law of England. They were abolished by statute of Edward III.
 Webster 1828 Edition
Brehon
BRE'HON
,Noun.