Coupled with the word _pitar_ the name Dyaus appears in the most ancient Aryan prayers as Dyaush-pitar, Zeus-pater, and Ju-piter. These composite names are no invention of the poets; they are the results of certain laws of language to which our minds--if they would not turn from the right path--must submit. The initial _dy_ in Dyaus is represented in Latin by _j_; Ju in Jupiter corresponds exactly with Dyaus. The name of the Teutonic god Tyr, genitive Tys, also corresponds, and as exactly, with Dyaus; in Gothic it would be Tius, and in Anglo-Saxon Tiw, preserved in Tiwsdæg, the day of the god Tyr, and Zio in Old High-German, where we find Ziestac for the modern Dienstag, the day of the god Mars. Tius, Tiw, Tyr, and Zio are forms that exist side by side, all of which of course proceed from that wonderful root _div_, and represent the bright sky, day, and god. No etymological interpretation would be satisfying which did not embrace all these forms, since they are all dialectic variations of Dyaus, the same name in different languages. All names truly related have but one root, in the same way as living beings who are brothers have but one mother. If another proof were needed of the uninterrupted continuity of speech and thought amongst the chief of the Aryan people, the following fact will afford it:-- At the time when the schools flourished in Athens, and when the Greeks were hardly conscious of the existence of India, it would have been possible, I suppose, to see young pupils seated before tables on which the master had written the declensions which composed the task for the day. There might be read:-- _Nom._ Zeús _Gen._ Dios _Dat._ Dii _Acc._ Dia _Voc._ Zeû Thus the young Athenians wrote the name of Zeus with an acute accent in the nominative, and a circumflex in the vocative. At the same time the pupils of the Brahmans at Benares, when declining the name of their supreme deity, accented the syllables exactly in the same way as the Greeks, and they wrote:-- _Nom._ Dyaús _Gen._ Dyvas _Dat._ Divi _Acc._ Divam _Voc._ Dyaûs But there was this difference between the Grecian pupils and the Hindoos, that the former were ignorant of the reason of these changes of accent, since the explanation was lacking in the Greek grammar, whereas the Sanscrit grammar explained to the latter the general principles of accentuation on which the changes rested. The name of Dyaus was the source from which sprang an unique name, coined once and for ever, adopted by our entire family; the Greeks have no more borrowed it from the Hindoos, than the Romans and the Teutons from the Greeks; for it was pronounced before the separation of our ancestors with regard to language or religion; its meaning was Heaven-Father.