Answer

Bhagwan Sambhavnath ke pehle bhav ka naam aam taur par Raja Vipulvahan bataya jata hai. Kuch granthon aur lekhon mein Vimalvahan bhi likha milta hai, isliye name-prayog mein thoda antar dikh sakta hai. ( jainworld.com)

Explanation

Jain charitra ke anusaar, Raja Vipulvahan ne rajya tyag karke diksha li thi, aur uske baad unka aatma pehle dev-gati mein aur phir Bhagwan Sambhavnath ke roop mein janma hua. ( jainworld.com)

Spiritual Understanding

Is katha ka mool sandesh yeh hai ki karuna, tyag aur vairagya se bahut unnat punya bandhta hai, jo aatma ko uchch gati aur moksh-marg ki or le jata hai. ( jainworld.com)

Takeaway

Short answer: Vipulvahan. ( jainworld.com)