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Genesis 15 lists ten peoples living in the land promised to Abram. Their names are in red with a star, because no one knows exactly where each lived. The map's Rephaites are the King James Bible's Rephaims. The map writes "Wadi of Egypt." That is the brook of Egypt of Numbers 34:5. Genesis 15:18 uses a different Hebrew word: nehar, the river of Egypt.
Read it: Genesis 15:18-21