Raja Ajit Singh Bahadur (16 October 1861 – 18 January 1901) was the ruler of the Shekhawat estate (thikana) of Khetri at Panchpana in Rajasthan between 1870 and 1901.

He died on 18 January 1901 due to an accident at the tomb of Akbar in Sikandra near Agra and was cremated at Mathura.

Ajit Singh is known for providing financial support to Vivekananda, and encouraging him to speak at the Parliament of the World's Religions at Chicago in 1893.

Ajit Singh died on 18 January 1901 due to injuries he sustained from the collapsing of a tower, on which he was standing, at the tomb complex of Mughal emperor Akbar in Agra and was cremated at Mathura.

[5] In a letter written to Marhy Hale, on 18 May 1901, Vivekananda informed—[6] The Raja of Khetri died from a fall a few months ago.

Yet I am sure to bob up soon and am waiting for the next turn.In a separate letter written to Mrs. Ole Bull on 26 January 1901, Swami Vivekananda wrote:[7] I went to see Mrs. Sevier at Mayavati.

According to Mani Shankar Mukherjee's The Monk As Man: The Unknown Life of Swami Vivekananda, on 4 June 1891, Ajit Singh woke up at 6:30 am.

[11] During his stay Vivekananda closely observed the culture and lifestyle of Rajputana and later praised it in his lectures and letters.

[9] An incident that happened during his second visit, which was later widely analysed, relates to Ajit Singh organizing a function where a courtesan was to sing.

The dancing girl heard about this comment and at the function she sang a famous song by Sur— O Lord, look not upon my evil qualities!

[11] Vivekananda wished to sail to America to attend the Parliament of the World's Religions as a speaker, which was to be held in Chicago in 1893.

When Ajit Singh learned about this, he encouraged Vivekananda to join the Parliament as a representative of Hinduism and India and provided him financial aid and the tickets for his voyage.

It was on Ajit Singh's request that Swamiji assumed his monastic name Vivekananda in preference to Sachidananda.

Ajit Singh arranged to send more money to Vivekananda after his arrival at Boston, as American dollars.

In America Vivekananda lost his money and when Ajit Singh learnt of it, he immediately sent US$ 150 more through telegraph service.

[17] Again, he wrote in a letter to Munshi Jagmohanlal on 11 October 1897, "Certain men are born in certain periods to perform certain actions in combination.

When Ajit Singh got the news of Vivekananda's arrival, he traveled 12 miles (19 km) from his palace to welcome him.

At Khetri, all employees of the palace showed their respect to Vivekananda by touching his feet and giving him a two rupee coin each.

Mani Shankar Mukherjee in his book The Monk As Man: The Unknown Life of Swami Vivekananda commented— "It is, indeed remarkable that a disciple should be so generous towards his teacher's family".

[9] Mahendranath Datta, Swami Vivekananda's brother, wrote in his book— Khetri's Maharaj used to send 100 rupees to Swamiji's mother on a regular basis.

He specially requested that this arrangement be not discussed with others.The letters stored at Khetri's archive show that Ajit Singh frequently communicated with members of Vivekananda's family from 1892 onwards.

In his next letter dated 22 March 1893 Mahendranath told Ajit Singh the names of the books he recently read.