Andhara is an ancient non-Aryan race. In Aitareya Brāhmaṇa (Aitareya Brahmana) it is said that , Viśvāmitra , grieved by the death of his son, cursed this race. Andhra is another name of Andhara.

See Andhra

Aitareya Brāhmaṇa(7.81)