Wie er hieß, ist unbekannt. Zu den ältesten schriftlichen Nachweisen Goedicke, "The ancient Egyptians, as far back as writing extends, called it (itrw) "the river" or (itrw '3) "the great river," mostly in the Late Period, when their expanded geographical knowledge made a qualification desirable. This designation passed into Hebrew as a loanword ... and survived in Coptic as EIEPO. They agree in omitting the "t" which the conservative hieroglyphic orthography retained, although the dental had apparently dropped out by the Eighteenth Dynasty. In addition to this word for their river, the Egyptians had also the term h'p for the annual inundation, but they did not apply it to the river proper." Sorry, die Kopierfunktion hat Grenzen, bei Bedarf gern Kopie. Erwähnenswert ist noch der Ansatz "nir" über Babylonien.