Etymology and names
In the ancient Iteru (Hapy), meaning "river". In Coptic, the word ⲫⲓⲁⲣⲱ, pronounced piaro (Sahidic) or phiaro (Bohairic), means "the river" (lit. p(h).iar-o "the.canal-great"), and comes from the same ancient name.
In Egyptian Arabic, the Nile is called en-Nīl while in Standard Arabic it is called an-Nīl. The river is also called in Coptic: ⲫⲓⲁⲣⲱ, P(h)iaro; in Ancient Egyptian: Ḥ'pī and Jtrw; and in Biblical Hebrew: הַיְאוֹר, Ha-Ye'or or הַשִׁיחוֹר, Ha-Shiḥor.
The English name Nile and the Arabic names en-Nîl and an-Nîl both derive from the Latin Nilus and the Ancient Greek Νεῖλος. Beyond that, however, the etymology is disputed. Hesiod at his Theogony refers that Nilus (Νεῖλος) was one of the Potamoi (river gods), son of Oceanus and Tethys. Another derivation of Nile might be related to the term Nil (Sanskrit: नील, translit. nila; Egyptian Arabic: نيلة), which refers to Indigofera tinctoria, one of the original sources of indigo dye; or Nymphaea caerulea, known as "The Sacred Blue Lily of the Nile", which was found scattered over Tutankhamen’s corpse when it was located in 1922.
Another possible etymology derives it from a Semitic Nahal, meaning "river". The standard English names "White Nile" and "Blue Nile", to refer to the river's source, derive from Arabic names formerly applied only to the Sudanese stretches which meet at Khartoum.