It was Persia until 1935; in 1949 the government permitted both names
This name was in general use in the West until 1935, although the 
Iranians .... as the approaches to it by both land and sea were narrow and difficult 
and would... [DOC] [TLE] Iransaga - Persia or Iran, a brief history - Art Arena [PAR] In 1935 the Government specified that it should be called Iran; however, in 1949 
they allowed both names to be used.