The Hebrew name Jerahmeel, which appears several times in the Tanakh (see the article Jerahmeel), also appears in various forms as the name of an archangel in books of the intertestamental and early Christian periods.
In the deuterocanonical book 2 Esdras, also known as 4 Ezra, which has come down to us in Latin and appears as an appendix to the Vulgate, there is a reference in chapter 4 verse 36, to Jeremiel (in the Latin Hieremihel), which, however, does not occur in all the manuscripts. Other versions have Remihel, Oriel or Uriel. In this passage the angel or angels (Uriel is also there) are answering Ezra's many questions about heaven and hell.
Jeremiel (under any of his name alterations: Eremiel, Remiel, Remihel, etc.) had a very dour yet comforting duty in the pre-Christian eras. He was set over Sheol (the underworld) in Abrahamic tradition, in particular the "Bosom of Abraham", a region of the underworld almost identical in concept to the Greek idea of Elysium. Here Jeremiel was responsible for placating the righteous souls awaiting the Lord who resided there. In the post-Christian world Jeremiel's duty evolved and is paired with St. Simon Peter as gatekeeper of Heaven. In both cases Jeremiel watches over and guides the holy deceased in their afterlife journey.
In two or three places in the Book of Enoch, available in Ethiopic, there are lists of angels. Included are Rame'el and Ram'el (in the same list). There are occasional references, in various spellings, in other apocryphal manuscripts.
For modern uses of the angel's name and identity, see the article Ramiel.
James H Charlesworth (ed) The Old Testament Pseudepigrapha, Darton, Longman & Todd, London 1983.