Kalmar "Parjanya" ta samo asali ne daga Sanskrit, wanda tsohon harshen Indiya ne. A cikin tatsuniyar Hindu, ana ɗaukar Parjanya a matsayin allahn ruwan sama da tsawa.Bisa ga ƙamus, kalmar Parjanya tana nufin "allahn ruwan sama," "girgije," ko "aradu." Yawancin lokaci ana danganta shi da yanayin yanayi na ruwan sama, kuma an yi imanin cewa yana kawo haihuwa a duniya, yana ciyar da amfanin gona da tsire-tsire. Haka nan ana amfani da kalmar a misalta mutum ko abin da ke kawo fa’ida mai girma ko albarka, kamar an yi ruwan sama a kansu.