In Egyptian mythology the creating word of the sun-god of Heliopolis, personified in the same god. With Sia he forms a primeval pair, both born from a drop of blood from the penis of Re, and together the personify the insight and wisdom of the sun-god. They also accompany him on his solar barque and help the bring order in chaos. When the pharaoh became a lone star, his companion was Hu.
The name of Hu in hieroglyphs.