Rashtra's son was Dirghtama Dirghtamaa's son was  Dhanvantari . Dhanvantari started  Ayur Veda . He takes his share in Yagya and is the Ansh of  Vasudeva . Dhanvantari's son was Ketuman Ketuman's son was Bheemarath Bheemarath's son was Divodas Divodas' son was Dyuman - his other names are Pratardan, Shatrujit, Vats,