I assume you mean Acharya Jaymalji Maharaj Saheb of the Sthanakwasi Jain tradition. He was born in Lambiya village, Merta Pargana, Jodhpur, Rajasthan, to Kamdār Mohandasji Mehta and Mahimā Devi on Bhadra Shukla Trayodashi, Vikram Samvat 1765. He took diksha at Merta on Margashirsh Krishna Dvitiya, Vikram Samvat 1788 from Acharya Shri Budharji Maharaj Saheb. Later, on Vaishakh Shukla Tritiya, Vikram Samvat 1805, he was conferred Acharyaship and established the Akhil Bharatiya Jaymal Jain Shravak Sangh; his tradition came to be known as Jaygaccha. ( jppjaingroups.com)

In terms of lineage, his monastic line is associated with Acharya Budharji Maharaj Saheb as guru, and after Jaymalji, Yuvacharya Raychandraji Maharaj Saheb was named his worthy successor and later became Acharya. Jaymalji’s final spiritual practice was Sallekhana-Santhara, which he accepted on Chaitra Shukla Purnima, Vikram Samvat 1853, at Nagaur. ( jppjaingroups.com)

He is remembered in Jain history as a saint-poet, strict ascetic, and social reformer, with more than 250 poetic works attributed to him, and with a strong emphasis on discipline, celibacy, and purified Jain conduct. ( jppjaingroups.com)

If you want, I can also give you his full guru-parampara in simple list form.