Baron \b(a)-ron\ as a boy's name is pronounced BARE-an. It is of Old German and Old English origin, and the meaning of Baron is "young warrior". A title of nobility, along the lines of Earl and Duke, used as a given name. In England, a baron was the lowest rank of hereditary peerage that entitles the holder to serve in the House of Lords. It is rare to find such nobility names in countries where there is an official aristocracy. Also the Hebrew phrase "Bar Aaron", meaning "son of Aaron".
For more information, see also the related name Barnett.