osiris4dOsiris, one of the most important gods of ancient e orin of Osiris is obscure; he was a local god of Busiris, in Lower Egypt, and may have been a personification of chthonic (underworld) fertility.By about 2400 bce, however,Osiris. Osiris, god of the deceased, was the son and oldest child of Geb, the Earth deity and Nut, the sky goddess. His wife and sister was Isis, goddess of motherhood, magic, fertility, death,