Answer

There seem to be two Jain-related figures with similar names. One source lists Mohnot Seth Jivandasji in the Mohnot Oswal lineage, but the available entry is very brief and does not give a full biography. ( oswals.net)

Explanation

If you mean the Mohnot family figure, the source only places him within the Mohnot gotra history and then moves on to another family member; it does not preserve more detailed life events for Jivandasji himself. ( oswals.net)

If you mean Seth Jivandasji of Calcutta, a Jain book summary says he was credited with building the Jalmandir at Pavapuri in V.S. 1628 (about 1571 CE). ( jaingpt.org)

Takeaway

So, the history available online is limited and name-confusing. The safest statement is that Mohnot Seth Jivandasji appears in the Oswal Jain lineage record, while another Seth Jivandasji is associated with the Pavapuri Jalmandir. ( oswals.net)