Gad

1 Chronicles 29:29
Now the acts of King David, from first to last, they are indeed written in the Chronicles of Samuel the Seer, the Chronicles of Nathan the Prophet, and the Chronicles of Gad the Seer,

1 Samuel 9:9
(Formerly in Israel, a man on his way to inquire of God would say, "Come, let us go to the seer, " for the prophet of today was formerly called the seer.)

2 Samuel 24:11
When David got up in the morning, a revelation from the LORD had come to Gad the prophet, David's seer: