The Patriarch Jacob was said to have become Uriel. Our concept of angels came originally from the Persians. It was passed on to the Babylonian . Even the Moslems take their ideas about Angels from Hebrew and Christians sources. While Christianity hold with the idea that all Angels were created at once at the time of creation.
Hebrew scholars hold with the idea of continuous creation.
That new stars as well as Angels are being created with every breath that God breaths. The Jews believe that God spoke Hebrew and thus so do all of His Angels. Mankind was suppose to have spoken Hebrew up until the incident of the tower of Babel. They are considered the highest order of spiritual beings. They are so far above human consciousness that they are seldom seen by us mortals.