Your question is incomplete, so I’m not sure whom you are referring to by “he.”

To answer correctly (especially about a Jain ācārya, tīrthankar, or saint and whether he belonged to the 6th–7th century), I need the exact name of the person.

Please tell me:

• The name of the person (for example: Āchārya Kundkund, Āchārya Haribhadra Sūri, etc.)

Then I can tell you the correct time period according to Jain tradition.