Answer

Khartargachchha was established in the 11th century CE within the Śvetāmbara Jain tradition.

It is traditionally associated with Āchārya Jineshwar Sūri, who is regarded as an important early founder/establisher of the Khartargachchha tradition.

Explanation

Khartargachchha arose as a reform-oriented Śvetāmbara Jain monastic tradition. The name “Khartara” is traditionally connected with sharpness or strictness in religious discipline and scriptural understanding.

Takeaway

So, in simple terms: Khartargachchha was established around the 11th century CE, traditionally linked with Āchārya Jineshwar Sūri.