Djau was a vizier of Upper Egypt during the Sixth Dynasty. He was a member of an influential family from Abydos; his mother was the vizier Nebet, his father was called Khui. His two sisters Ankhesenpepi I and Ankhesenpepi II married Pharaoh Pepi I. Djau was already in office when his nephew Pepi II became pharaoh. He is mentioned in two royal decrees, one from Abydos, the other from Coptos; one of them is dated to Year 11. It is unknown when he died, but when the tomb of Pepi II was decorated, he was no longer vizier. He was buried in Abydos, but the exact place of his tomb is not known.