1. Shaheed Udham Singh - (26 December 1899 – 31 July 1940) was a revolutionary belonging to the Ghadar Party, best known for his assassination in London of Michael O Dwyer, the former lieutenant governor of the Punjab in India, on 13 March 1940. The assassination was in revenge for the Jallianwala Bagh massacre in Amritsar in 1919 for which O Dwyer was responsible. Singh was subsequently tried and convicted of murder and hanged in July 1940. While in custody, he used the name Mohammad Singh Azad, which represents his anti-colonial sentiment.