Judaism has one god known by the Tetragrammaton, which is the four-letter name of God. It is written in English translations as YHWH, YHVH or JHVH.
In the Old Testament, God describes his name as "I am" in Exodus 3:14. This relates to YHWH, which is the third-person form of the "to be" verb. Judaism teaches that the four-letter name of God is forbidden to be said out loud. Instead, Jews frequently use the name Adonai. Some other names that Judaism attributes to God include Elohim, Elyon, El Shaddai, Shalom and Shekhinah. Some derivative names of YHWH found in the Old Testament include: YHWH-Yireh, the Lord will provide; YHWH-Rapha, the Lord that heals; YHWH-Nissi, the Lord our banner; YHWH-Shalom, the Lord our peace; YHWH-Ra-ah, the Lord my shepherd; YHWH-Tsidkenu, the Lord our Righteousness; YHWH-Shammah, the Lord is present and Tzur Israel, the Rock of Israel.