"Atthai" (अठाई) is a Jain religious observance involving an eight-day fast, typically observed during the holy period of Paryushan or at other auspicious times.

• Atthai na parne refers to the person who is performing or observing the eight-day fast (Atthai).
• Atthai karnewale ka naam means: What is the term for the person who does Atthai?

In Jain tradition, a person who performs Atthai is called an Atthai Tapasvi (अठाई तपस्वी) or simply Tapasvi. In common parlance, people respectfully refer to them as Atthaiwala Tapasvi or Tapasvini (for females).

So, the name for the person performing Atthai is: Atthai Tapasvi