In Greek, the pantheon of Heliopolis was named the Ennead (the Group of Nine). Unlike some other Egyptian pantheons, the Heliopolis pantheon is a family with a specific biography, much as is the case with the Olympian Greek pantheon. The creator god was Atum, who was associated with the great sun god Ra (Re) as Atum-Ra. The offspring of Atum were Shu (Air) and Tefnut (Moisture). Shu and Tefnut produced the earth god Geb and his sister-wife, the sky goddess Nut, who was often depicted as a nude woman whose body arched over the reclining and sometimes sexually aroused Geb. Geb and Nut were the parents of arguably the most important family in Egyptian mythology: Osiris and his sister-wife Isis (the parents of the child Horus) and Seth and his sister-wife Nephtys. Osiris is depicted as a mummy wearing a kind of crown and carrying a crook; Isis wears a throne symbol on her head. Seth’s head is often that of a mysterious ferocious animal.