The name ZhangYuu can be written in Chinese characters as 張勇 in traditional form and 张勇 in simplified form. Zhang is a common Chinese surname. As per the Wikipedia article for Zhang (surname):
- Zhang (traditional Chinese: 張; simplified Chinese: 张; pinyin: Zhāng) is among the most common Chinese surnames. In the 1990 edition of Guinness Book of Records, it was listed as the world's most common surname, with over 100 million people worldwide with this surname. It was also ranked third in the People's Republic of China by the Chinese Academy of Sciences in early 2006. . The use of this surname dates back to about 4,700 years ago...
The second character, 勇, means "brave, courageous, fierce". In Japan, it may be used as the male given name Isamu (hiragana: いさむ, romaji: Isamu). The on'yomi of this character is yū (ゆう, hence the second part of my username, "Yuu".
Note that this is not my real name, so I must laugh at anybody who tries searching for me.