The Seth (or Set) of Egyptian mythology was struck down by Horus ( the son of Osiris) who restores order to the world.
We are not told how the biblical Seth (3rd son of Adam and Eve) died.
seth has died by in satvachion
Seth Harding died in 1814.
Seth Shepard died in 1917.
Seth Hastings died in 1831.
Seth Joshua died in 1925.
Seth Hukumchand died in 1959.
Seth Lover died in 1997.
Seth Waring died in 1919.
Seth Bingham died in 1972.
Seth Sothel died in 1694.
Oliver Seth died in 1996.
Seth Sendashonga died in 1998.