Leto II the Elder was the first born child of Paul Atreides and his lover (and later concubine) Chani. He was murdered in infancy by Glossu Rabban Harkonnen during a Sardaukar attack on the sietch where he was being hidden.
Priests on Rakis, some 1500 years after the God Emperor's death, theorised that Leto II the Elder was reincarnated in the second child by Muad'Dib and that a part of him remained in Heaven, nameless, to assist in the transition after death.
Behind the Scenes[edit | edit source]
Leto II the Elder is omitted from the 1984 Dune film , while his portrayal in the 2000 Dune miniseries is largely the same as in the book, though he was killed by an unidentified Sardaukar rather than Rabban.
(addendum) While it's been noted above that the infant son of Chani and Paul, whom had been killed in an attack at the hands of The Beast Rabban, wasn't in the 1984 (David Lynch) version of Dune.... That specific scene IS shown with many not realizing (possibly having forgotten?) during a raid in the southern seitch.