Name of Red Sea

The sea was called the “Arabian Gulf” in most European sources up to the 20th century. This was derived from older Greek sources. Herodotus, Straban and Ptolemy all call the waterway “Arabicus Sinus", while reserving the term “Sea of Erythrias” (Red Sea) for the waters around the southern Arabian Peninsula, now known as Indian Ocean.

The name of the sea does not indicate the colour of the water. It may signify the seasonal blooms of the red-coloured cyanobacteria Trichodesmium erythraeum near the water surface. Some suggest that it refers to the mineral-rich red mountains nearby which are called ” (harei edom). Edom, meaning “ruddy complexion", is also an alternative Hebrew name for the red-faced biblical character Esau (brother of Jacob), and the nation descended from him, the Edomites, which in turn provides yet another possible origin for Red Sea.

There is also speculation that the name Red Sea came from a mistranslation of what should have been the Reed Sea in the Biblical story of the Exodus. The Sea of Reeds (in Hebrew Yâm-Sûph) is often mistranslated as the “Red Sea".

One hypothesis is the name comes from the Himarites, a local group whose own name means “red.” Another theory favored by some modern scholars is the name “red” is referring to the direction “south,” the same way the Black Sea’s name may refer to “north.” The basis of this theory is that some Asiatic languages used color words to refer to points on the compass.