Usiel

Usiel - In the cabala generally, as in Targum Onkeles and Jonathan, Usiel is an angel that fell, and is therefore evil; he was among those who wedded human wives and begat giants.  Of the 10 unholy sefiroth, Usiel is listed 5th.  In The Book of the Angel Raziel, Usiel (Uzziel) is among the 7 angels before the throne of God and among 9 set over the 4 winds.  [Rf. Bischoff, Die Elemente der Kabbalah.]  Usiel replaces Uriel in the reprint English translation of Verus Jesuitarum Libellus ("True Magical Work of the Jesuits").  [Rf. Waite, The Book of Ceremonial Magic, p. 110.]  The Key to Faust's Threefold Harrowing of Hell (otherwise known as a Key to the Black Raven) contains a general conjuration to Usiel and a list of his adjutant princes.  [Rf. Butler, Ritual Magic, p. 190.]  Finally, according to Milton, Usiel is a good angel, of the order of virtues, a lieutenant of Gabriel's in the fighting in Heaven at the time of Satan's defection.  (a)

Resource List - all entries are taken verbatim from the original source:

(a) "The Dictionary of Angels" by Gustav Davidson, © 1967