From Middle English baroun, from Old French baron, from Latin barōnem, from Proto-West Germanic *barō, ultimately from Proto-Indo-European *bʰer- (“to bear”). Cognate with Old High German *baro (“human being, man, freeman”), Old English bora (“a man who bears responsibility, one who is in charge, a ruler”), and perhaps to Old English beorn (“man, warrior”). Used in early Germanic law in the sense of "man, human being". A Celtic origin has also been suggested; see the quote under sense 3 of Latin barō. However, the OED takes the hypothetical Proto-Celtic *bar- (“hero”) to be a figment.