Indigenous Aryans were inter-related, and the notion of biological race came to the forefront The "Aryan race," the presumed identity of Indo-European language speakers was prominent among such races, which was seen to be further subdivided into "European Aryans" and "Asian Aryans," each with their own homelands. Max Mueller, who translated the Rigveda during 1849–1874, postulated an original homeland for all Aryans in central Asia, from where a northern branch was believed to have migrated to Europe and a southern branch came to India and Iran. The Aryans were fair-complexioned Indo-European speakers who conquered the dark-skinned "dasas" of India. The upper castes,
Land of Israel of the Bible uses the name, "the River", to refer to the Euphrates. Only the "Red Sea" (Exodus 23:31) and the Euphrates are mentioned to define the southern and eastern borders of the full land promised to the Israelites. The "Red Sea" corresponding to Hebrew "Yam Suf" was understood in ancient times to be the Erythraean Sea, as reflected in the Septuagint translation. Although the English name "Red Sea" is derived from this name ("Erythraean" derives from the Greek for red), the term denoted all the waters surrounding Arabia—including the Indian Ocean and the Persian Gulf, not merely the sea