I have written about the use of "Elias" to denote a "forerunner" here:
"Elias" as a "Forerunner" in LDS Scripture
Interestingly, Parley P. Pratt (1807-1857) used "Elias" as a title of Joseph Smith and his role as a "forerunner":
"Elias" as a "Forerunner" in LDS Scripture
Interestingly, Parley P. Pratt (1807-1857) used "Elias" as a title of Joseph Smith and his role as a "forerunner":
Joseph Smith was the Elias, the Restorer, the presiding Messenger, holding the keys of the "Dispensation of the fulness of times." (Key to the Science of Theology, p. 79)