The Tốn line (Vietnamese: chi Tốn; Hán tự: 支巽; chi can also be translated to as branch) was the fifth dynasty of Hùng kings of the Hồng Bàng period of Văn Lang (now Viet Nam). Starting approximately 1912 B.C., the line refers to the rule of Viên Lang and his successors, when the seat of government was centered at Phú Thọ.