Asura · Shakta · Pan-India
Durgama
A demon, son of Ruru, who won all the Vedas from Brahma by a thousand years of tapas, so that worship stopped and a hundred years of drought followed, until the goddess killed him and took his name as hers, Durga.
Sources: Devi Bhagavata Purana 7.28, On the glory of Shatakshi Devi, tr. Swami Vijnanananda (1921) · see Durgama's web