Tunku Dato’ Seri Nadzaruddin ibni Almarhum Tuanku Ja’afar (born 26 October 1959) is the third son and (youngest) of Tuanku Jaafar of Negeri Sembilan.

Tunku Nadzaruddin was born at Kuala Lumpur, 26 October 1959 as the third son and youngest-born child of late Tuanku Ja’afar ibni al-Marhum Tuanku ‘Abdu’l Rahman, later Tuanku Jaafar of Negeri Sembilan, and his wife Tuanku Najihah binti Tunku Besar Burhanuddin (herself a member of the Royal House of Negeri Sembilan and much younger first cousin of her husband's father Tuanku Abdul Rahman of Negeri Sembilan).^{[citation needed]}

His siblings are :

• Eldest sister Tunku Tan Sri Naquiah, Tunku Dara (26 December 1944)
• Eldest brother Tunku Dato' Seri Utama Naquiyuddin, Tunku Laksamana (8 March 1947)
• Elder brother Tunku Tan Sri Dato' Seri Imran, Tunku Muda of Serting (21 March 1949)
• Elder sister Tunku Puan Sri Jawahir, Tunku Putri (27 January 1952)
• Elder sister Tunku Dato' Seri Irinah (23 November 1957)

• St. Paul's Institution, and King George V School, Seremban, Malaysia
• Cheltenham College, Gloucestershire, United Kingdom
• University College, London, United Kingdom
• Middlesex University, United Kingdom (B.Sc.)

He married, at the National Palace, Kuala Lumpur, 6 November 1997, Y.M. Tunku Dato’ Seri Mimi Wahida binti Tunku ‘Abdu’llah Wahman (b. 14 June 1971), a former television personality, Dir Radin Technologies Sdn Bhd, daughter of Y.M. Raja ‘Abdu’llah Wahman bin Raja Sulaiman, by his wife, Y.M. Tunku Azimi binti Tunku Muhammad Yusuf, daughter of Commander Y.M. Datuk Tunku Muhammad Yusuf bin Tunku Nambul, of Jelebu. He has issue, two sons and one daughter:

• Tunku Muhammad Hazim Shah Raden bin Tunku Nadzaruddin. born at Damansara Specialist Hospital, Selangor, 23 September 1999.
• Tunku Muhammad Mish’al Raden bin Tunku Nadzaruddin. born at Damansara Specialist Hospital, Selangor, 30 April 2001.
• Tunku Ines Najihah Raden binti Tunku Nadzaruddin. born at Damansara Specialist Hospital, Selangor, 23 September 2003.^{[citation needed]}

He has been awarded :^{[citation needed]}