1945-1 January 1946: Lieutenant-Colonel His Highness Farzand-i-Arjumand, Aqidat-Paiwand-i-Daulat-i-Inglishia, Barar Bans Sarmur, Raja-i-Rajagan, Maharaja Shri Pratap Singh Malvendra Bahadur, Maharaja of Nabha
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Pratap Singh began his schooling in the Anglo Indian school, Woodstock, in Musoorie.
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1941-1944: Lieutenant His Highness Farzand-i-Arjumand, Aqidat-Paiwand-i-Daulat-i-Inglishia, Barar Bans Sarmur, Raja-i-Rajagan, Maharaja Shri Pratap Singh Malvendra Bahadur, Maharaja of Nabha
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Maharaja Pratap Singh of Nabha (21 September 1919-22 July 1995) was the last ruling Maharaja of Nabha.
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1928-1941: His Highness Farzand-i-Arjumand, Aqidat-Paiwand-i-Daulat-i-Inglishia, Barar Bans Sarmur, Raja-i-Rajagan, Maharaja Shri Pratap Singh Malvendra Bahadur, Maharaja of Nabha
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15 October 1946 – 1995: Colonel His Highness Farzand-i-Arjumand, Aqidat-Paiwand-i-Daulat-i-Inglishia, Barar Bans Sarmur, Raja-i-Rajagan, Maharaja Shri Sir Pratap Singh Malvendra Bahadur, Maharaja of Nabha, KCSI
Manmohan Singh | Maharaja Ranjit Singh | Anurag Singh | Yuvraj Singh | Ranjit Singh | Jagjit Singh | Vijay Singh | Guru Gobind Singh | Bhagat Singh | Karan Singh | Nabha | Khushwant Singh | Jai Singh I | Hari Singh | Talvin Singh | Simranjit Singh Mann | Parkash Singh Badal | Maharana Pratap | Yograj Singh | Upasana Singh | Tiger Jeet Singh | Satendra Singh | Raj Singh | Mulayam Singh Yadav | Karamjit Singh | Harbhajan Singh | Ajit Singh | Sukhbir Singh Badal | Rawal Ratan Singh | Rajendra Singh |