Thanatos means “death” in Greek, and it was the name of the god of nonviolent deaths. He’s not always depicted as a god — sometimes, he’s considered a spirit. The personification of death. "In Greek mythology, Thanatos represents deaths brought on by old age or peaceful circumstances such as sleep or illness. These deaths are gentle and painless. The touch of Thanatos was gentle, often compared to the touch of Hypnos (his twin), who was the god of sleep.