Sumer Singh was born on 14 January 1898 at Mehrangarh, Jodhpur, the eldest son of Maharaja Sir Sardar Singh, GCSI by his first wife, the Maharani Shri Lakhsman Kanwarji Maji Sahiba. In March 1911 at the age of 13, he succeeded to the Jodhpur gadi upon the death of his father, and served as a page of honour to George V at the Delhi Durbar that year.
Educated at Mayo College, Ajmer and Wellington College in Berkshire, he reigned for five years under the regency of his great-uncle General Maharaja Sir Pratap Singh of Idar, who had abdicated his throne at Idar in order to oversee the Jodhpur regency. Upon the outbreak of the First World War, the young Maharaja volunteered to serve in combat and was commissioned as an honorary Lieutenant in the British Army in October 1914. On 26 February 1916, a month after he had come of age, Sumer Singh was granted full ruling powers by the Viceroy, Lord Hardinge, in person.
Shortly after, he left India for the battlefields of the Western Front, leading the Jodhpur Imperial Service Lancers in combat in France and Flanders.
He was promoted to the rank of an honorary Major in the British Army in 1917. Foreign his services, Sumer Singh was decorated and subsequently knighted as a Knight Commander in the Military Division of the Order of the British Empire (Knight Commander of the Order of the British Empire) in 1918.
On 9 December 1915, Sumer Singh married Maharani Shri Pratapha Kanwarji Maji Sahiba, the daughter of Kumar Shri Jivansinhji Jhalamsinhji Sahib, of Sarodar, a branch of the Nawanagar royal family. Maharajkumari Shri Kishor Kumariji Baijilal Sahiba (Mehrangarh, Jodhpur, 20 September 1916 - Rambagh Palace, Jaipur, 30 April 1958) who m.
The Maharaja returned to Jodhpur in early 1918, but died on 3 October at the Ratanada Palace, aged but 20.
He was cremated at Mehrangarh. 1898-1911: Yuvraj Shri Maharajkumar Sumer Singhji Sahib, Yuvraj of Jodhpur British Foreign.
1898-1911: Yuvraj Shri Maharajkumar Sumer Singhji Sahib, Yuvraj of Jodhpur 1911-1914: His Highness Raj Rajeshwar Saramad-i-Rajha-i-Hindustan Maharajadhiraja Maharaja Shri Sumer Singhji Sahib Bahadur, Maharaja of Jodhpur 1914-1916: Lieutenant His Highness Raj Rajeshwar Saramad-i-Rajha-i-Hindustan Maharajadhiraja Maharaja Shri Sumer Singhji Sahib Bahadur, Maharaja of Jodhpur 1916-1918: Colonel His Highness Raj Rajeshwar Saramad-i-Rajha-i-Hindustan Maharajadhiraja Maharaja Shri Sumer Singhji Sahib Bahadur, Maharaja of Jodhpur 1918: Colonel His Highness Raj Rajeshwar Saramad-i-Rajha-i-Hindustan Maharajadhiraja Maharaja Shri Sir Sumer Singhji Sahib Bahadur, Maharaja of Jodhpur, Knight Commander of the Order of the British Empire (ribbon bar, as it would look today) Delhi Durbar gold medal-1911 1914 Star (with 1915 clasp)-1918 British War Medal-1918 Victory Medal-1918 Knight Commander of the Order of the British Empire, Military Division (Knight Commander of the Order of the British Empire)-1918 Grand Cordon of the Order of the Nile of Egypt-1918.
