Origin story
The Kodungallur temple, linked in local tradition with the Chera capital and with Kannaki of the Silappathikaram, holds the goddess as Kurumba, the fierce mother. Her Bharani festival draws thousands of oracles and devotees, and she is honoured as the protector of the land.
Kurumba Bhagavathi is a form of Bhadrakali, worshipped in her ugra, or fierce, form and known as the mother of Kodungallur. The temple is regarded as the head of the Bhadrakali kavus of Malabar, and its Bharani festival transforms collective devotion into a shared renewal.
Source: Wikipedia: Kodungallur Sree Kurumba Bhagavathy Temple — https://en.wikipedia.org/wiki/Kodungallur_Sree_Kurumba_Bhagavathy_Temple