Hypnos was the Greek god of sleep and the personification of sleep itself. In most myths, he was the son of Nyx and Erebus, the twin brother of Thanatos, the husband of Pasithea, and the father of the Oneiroi. According to Homer, he lives on the island Lemnos, which later on has been claimed to be his very own dream island. He is said to be a calm and gentle god, as he helps humans in need and, due to their sleep, owns half of their lives.