One Man, Three IDs 

     "In those days...I will make a righteous Branch sprout from David's line. He will do what is just and right in the land. In those days Judah will be saved and Jerusalem will live in safety." - Jeremiah 33:15

     Jeremiah wrote this around 580 B.C.  Of course, the Branch turned out to be Jesus. When He returns for the world-wide Millenium, He will have a special servant known by three different identifications.

     "I will place over them one shepherd, my servant David, and he will tend them and be their shepherd. I the Lord will be their God and my servant David will be prince among them. - Ezekiel 34:23-24 

     "My servant David will be king over them, and they will all have one shepherd. David my servant will be their prince forever." - Ezekiel 37:24 

     "Afterward the Israelites will return and seek the Lord their God and David their king. They will come trembling to the Lord and to his blessings in the last days." - Hosea 3:5 

It's already three millenniums since David was king over Judah. Like all of us, he wasn't perfect or sinless. But he was always after God's heart. While Christ rules the world, David will return as king over Israel...again. Many other Old Testament figures will appear again, along with Christians now in heaven.