Jeremiah 23:5-6 [written poetically] "Behold, the days are coming," says the Lord, That I will raise to David a Branch of righteousness; A King shall reign and prosper and execute judgement and righteousness in the earth. In His days Judah will be saved and Israel will dwell safely; Now this will be His name by which He will be called: THE LORD OUR RIGHTEOUSNESS. This isn't the first or only time Jesus is referred to as a "Righteous Branch." It's a term also used in Isaiah 4:2; and Zech 3:8, and 6:12. It refers to Jesus being THE righteous branch off of the tree trunk of King David. How is this important? Because Jesus had to be of the lineage of David (Isaiah 9:6-7), and that is the reason the beginning of Matthew recounts the lineage of Jesus and calls Him "the Son of David in Matt 1:1. Jesus was literally born a King.