In 1919 Lord Chelmsford named the city Jamshedpur in honour of its founder, Jamshedji Nausherwanji Tata, whose birthday is celebrated on 3 March as Founder's Day.
The city has several nicknames including 'Steel City' (which was referenced during Tata Steel's 'Green City - Clean City - Steel City' campaign); 'Tatanagar' after the name of its railway station or simply 'Tata' in deference to the significant presence of Tata companies in the city & it's adjoining areas.
for more info: http://en.wikipedia.org/wiki/Jamshedpur
