Mao Zedong
Mao Zedong is the Latin-alphabet version of Mao's name now used by most people.  In the romanization common in his lifetime, it was spelled "Mao Tse-tung".  "Mao" is his family name - in China, family names are placed first.  Mao is also called Chairman Mao,  because he was the Chairman of the Chinese Communist Party.