There was a shoemaker from Divon, and he was called Tuv, as he did good all his life. He came to Chevron and settled there. Tuv made shoes and uttered wisdom and became loved by all. He became old, and a girl called Chemed came to care for him. Tuv did not come near her, and he became very old. One night he shivered from cold, and Chemed came to keep him warm, and he came to her. That night, Tuv died.
Chemed gave birth to a son, Achituv. He was the father of Zadok ben Achituv, who was chosen by David.
See, the priest is chosen by the king. He chose one from the Levite city of Chevron, because life led him there.
The above story I made up, and its message is hopefully clear. Divon is close to Chevron, but it is in Moav. When a king will come, and will choose a Cohen, then we will have one.