Proper noun
Ahalya
(Hinduism) Name of the princess of Puru dynasty and wife of sage Gautama. She was seduced by Indra, cursed by her husband and liberated by Rāma in Ramayana.
Ahalya lived in a nearby place "Thagami" which in due course of time changed to the name "Thogummi". Source: Internet
A legend has it that the Sage Gautama lived in the Brahmagiri Hills at Trayambakeshwar with his wife Ahalya. Source: Internet