Sæmundr Sigfússon, The Elder Edda of Saemund Sigfusson and the Younger Edda of Snorre Sturleson… (1907)
“ FREYR and FREYJA. The name of the deity who was the symbol of the sun—to mean Seminator, the Fructifier, Freyja—the symbolical representation of the moon—means the Seminated, the Fructified; the original sig. is that of glad, joyful, imparting gladness, beautous, lovely. FRIGGA, prop. FRIGG. Grimm has shown that the root of this word is, if not strictly syn., at least very nearly allied with that of the word Freyja, and explains it to mean the Free, the Beauteous, the Winsome. ”
