Answer

According to one Jain Navagraha Shanti Vidhan chart, Mercury is associated with Tirthankar Mallinath, and Jupiter is associated with Tirthankar Mahavira. ( jainworld.jainworld.com)

Explanation

This is a devotional/astrological association found in some Jain materials. In the 24 Tirthankars, Mallinath is the 19th and Mahavira is the 24th Tirthankar. ( jainworld.com)

Takeaway

So, in that common Jain mapping:

• Mercury = Mallinath
• Jupiter = Mahavira ( jainworld.jainworld.com)