A suryavanshi king and son of Sagara.
Sagara married Keshini and Sumati. After they were childless for a long while, the disappointed king went away with his wives to meditate in Bhriguprashravana, a holy place in the Himalayas. After a hundred years, Bhrigu appeared and blessed him. Bhrigu said that his first wife would give him an evil son and his other wife would give him 6000 sons. Accordingly, after a few years, Keshini gave birth to Asamanjas and Sumati gave birth to a lump of flesh, which split into 6000 children, as per Ramayana Balakanda Sarga 83.
Asamanjas was an evil man and used to drown babies in the Sarayu river. He was hated by the subjects and finally, his father threw him out of the palace. But Asamanjas’ son was Anshuman, who was loved by his subjects, as per Ramayana Balakanda Sarga 38.