Rathorji (Bikawatji) Man Kanwarji of Kalori in Bikaner Hadiji (Chauhanji) of Kota Virpuriji (Solankiniji) of Lunawada Ari Singh (died infant) Sawai Ishwari Singh (1721 – 12 December 1750)[1] was the Kachwaha Rajput ruler of Jaipur Kingdom reigning for the seven turbulent and highly unstable political years from 1743 to 1750.

It was a major victory for Jaipur and to commemorate this occasion, Ishwari Singh built a second storied tower in 1749 which got the name Isar laat popularly known as Sarga Suli in the Tripolia Bazar.

He was forced to give lands to Madho Singh and pay tribute to the Holkars.

Ishwari Singh, ruler of Jaipur, consumed poison, and his queen and concubines committed jauhar fearing loss of honour at the hands of Holkar.

The Rajputs massacred over 3000 of them[2][3] The memorial of this Maharaja, who ruled Jaipur for 7 turbulent years, is situated near the lake Tal Katora near the City Palace complex.