Mastani’s son is usually understood to be Krishnarao , later known as Shamsher Bahadur I, and history gives a fairly clear picture of what happened to him and his line.

Who was Mastani’s son?

  • Bajirao I (the Peshwa) and Mastani had a son named Krishnarao, more widely remembered as Shamsher Bahadur I.
  • He was brought up within the Peshwa household; many accounts note that Kashibai, Bajirao’s first wife, took him in and raised him as her own at Shaniwar Wada.

What happened to him?

  • Shamsher Bahadur I grew up to be a noted warrior and was granted territories connected to Mastani’s dowry in Bundelkhand to govern.
  • He fought for the Maratha cause and died of wounds sustained in the Third Battle of Panipat in 1761, effectively giving his life in service of the Maratha Empire.

What happened to his descendants?

  • His son, Ali Bahadur I, ruled over Bajirao’s Bundelkhand lands and founded the princely state of Banda (in present-day Uttar Pradesh).
  • Later generations continued to be linked with key events like the 1857 uprising; the Banda rulers are recorded as having supported the broader revolt against British rule.
  • Even today, descendants identifying with this line live in places such as Bhopal, Indore, Sehore and the Banda region, often in relatively modest circumstances rather than as powerful royals.

Mini forum-style recap

Many online discussions asking “what happened to Mastani’s son” are really about whether he survived and what role he played in history.
The consensus from historical and regional sources is that he not only survived but became Shamsher Bahadur I, a key Maratha ally who died after Panipat, and his family line went on to rule Banda and later take part in the 1857 revolt.

TL;DR: Mastani’s son Krishnarao (Shamsher Bahadur I) grew up as a recognized member of Bajirao’s family, became a Maratha commander, died from injuries after the Third Battle of Panipat, and his descendants later ruled Banda and still live in parts of North and Central India today.

Information gathered from public forums or data available on the internet and portrayed here.