“Aath Koti Nani Paksh” is not a Jain tattva, sutra, or separate panth found in the classical scriptures. It is mainly a community / sangh name used in some Śvetāmbara Sthānakvāsī circles.

Very simply:

• Aath = eight
• Koti = crore (a very large number)
• Nani Paksh = a particular “Nani” group/faction within the local Jain community

So “Aath Koti Nani Paksh” is basically the title of a local Jain sangh / trust, which:

• runs a sthanak (non‑idol Jain place of worship)
• organizes pāṭha, pratikraman, pravachan, pātshālā, yatra, etc.
• is usually linked with Śvetāmbara Sthānakvāsī Jains, especially in areas like Kutch and Mumbai

Important points:

• It is not a new Jain philosophy, not a separate Jain “sampradāy” like Digambar / Śvetāmbara.
• It is not a scriptural term for “8 crore devs” or anything similar; it is just a traditional community name.
• Different cities/villages may have their own “Aath Koti Nani Paksh Jain Sangh / Sthanak,” but all follow the same basic Jain Dharma (ahiṃsā, aparigraha, 5 vows, etc.).

You can read more here