fem. proper name, from O.H.G. Berahta, Perahta, the name of a goddess, lit. "the bright one," from O.H.G. beraht, related to O.E. beorht (see bright). Soldiers' nickname Big Bertha for large-bore Ger. mortar of World War I is a reference to Frau Bertha Krupp von Bohlen und