Osiris

Osiris was was one of the Egyptian Nine Ennead. Osiris at times considered the oldest son of the Earth god Geb, and the sky goddess Nut, as well as being brother and husband of Isis, with Horus being considered his posthumously begotten son. usually identified as the god of the afterlife, the underworld and the dead.

Reference
Wikipedia Ennead

Wikipedia Osiris

First Found on HGS Manual Page 76