Yahweh Elohim developed from the Canaanite deity El.
Judaism and Christianity are based mostly in polytheistic traditions.
Sources:
https://books.google.com/books?id=S1tQ5Larst0C&printsec=frontcover&dq=origins+of+biblical+monotheism&hl=en&sa=X&ved=0ahUKEwjK4bvPy-PSAhXEKiYKHSstCEIQ6AEIHDAA#v=onepage&q&f=false
Mark S. Smith
Michael Cogan
Christine Hayes
William G. Dever
John C. L. Gibson
source