YHWH–Zidkenu, more commonly written in English as Jehovah Tsidkenu, is a name that means The Lord our Righteousness. Blue Letter Bible says that the actual name occurs only twice in the Old Testament, but the assurance that God is completely and totally righteous permeates the Bible.
5 “Behold, the days are coming, declares the Lord, when I will raise up for David a righteous Branch, and he shall reign as king and deal wisely, and shall execute justice and righteousness in the land. 6 In his days Judah will be saved, and Israel will dwell securely. And this is the name by which he will be called: ‘The Lord is our righteousness.’ Jeremiah 23:5-6