Scholars of Mandaic have long been aware of the puzzling usage of the feminine construct form bnat “daughters” in place of the masculine form bnia “sons;” however in the absence of further evidence this phenomenon has not received adequate attention in the reference grammars and lexicons of Classical and Post-Classical Mandaic. In the current paper I present a new interpretation for the development of the constructions bnat anaša and bnat anania in a masculine meaning (“human beings” and “children of clouds”) based on new data from Early Mandaic epigraphic sources and on one forgotten form in a secondary manuscript of the Ginza Rabba.