South Indian Digambaras developed as Jain communities and monastic traditions spread into the Deccan and South India over many centuries.

In brief:

• Jainism reached South India very early, through monks, merchants, rulers, and lay communities.
• Digambara tradition became especially strong in South India because many Digambara acharyas and monks established vihars and centers of learning there.
• Royal patronage from South Indian dynasties such as the Kadambas, Gangas, Chalukyas, Rashtrakutas, and Hoysalas helped Digambara Jainism grow.
• Important Jain centers like Shravanabelagola, Karkala, Moodabidri, and Hampi region became major strongholds of Digambara practice and scholarship.
• Over time, the South Indian Jain communities maintained Digambara discipline, scriptures, temples, and monastic lineages, making the tradition deeply rooted in Karnataka and nearby regions.

So, South Indian Digambaras did not “start” suddenly at one moment; they emerged gradually as Jain dharma spread southward and became firmly established through acharyas, royal support, and community practice.

If you want, I can also explain this in terms of historical timeline, acharyas, or how Digambara Jainism differs in South India.