Confucianism
Taoism
Buddhism
Yin and Yang
Legalism
Mohism
Zhizhe
Huangdi
Dao Cho
Xuan Zhuang
Master Jian Zhen
Abbot Taixu
Abbot Yuanying
Yang Wenhui
Zhao Puchu
Feng Youlan
Xiong Shili
The romanization system used most frequently today is the Pinyin, but there have been many different systems that "romanized" Chinese speech and text, including the Wade-Giles and Yale sytems. Because of this, you will find important individuals spelled in many different ways.
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Confucius, Kong Fuzi, K'ung Fu-tzu, Master K'ung, K'ung-tzu, Kongzi, Kong Zi
Mencius, Mengzi, Meng-Tzu
Laozi, Lao Tzu, Master Lao, Lao Tzu, Lao Tze, Lao Tse, Laozu
Zhuangzi, Chuang Tzu, Zhuāng Zǐ, Zhuang Tze, Zhuang Zhou, Chuang Tsu, Chuang Tzu, Chouang-Dsi, Chuang Tse, Chuangtze
Mozi, Mo Tzu, Micius, Mo Di