Today's Jerusalem Post reports that "archeologists have discovered ancient Egyptian coins bearing the name and image of the biblical Joseph... A thorough examination revealed that the coins bore the year in which they were minted and their value, or effigies of the pharaohs [who ruled] at the time of their minting. Some of the coins are from the time when Joseph lived in Egypt, and bear his name and portrait."
From the Middle East Media Research Institute: "Among these, there was one coin that had an inscription on it, and an image of a cow symbolizing Pharaoh's dream about the seven fat cows and seven lean cows, and the seven green stalks of grain and seven dry stalks of grain. It was found that the inscriptions of this early period were usually simple, since writing was still in its early stages, and consequently there was difficulty in deciphering the writing on these coins. But the research team [managed to] translate [the writing on the coin] by comparing it to the earliest known hieroglyphic texts… Joseph's name appears twice on this coin, written in hieroglyphs: once the original name, Joseph, and once his Egyptian name, Saba Sabani, which was given to him by Pharaoh when he became treasurer. There is also an image of Joseph, who was part of the Egyptian administration at the time."