This is a Chinese name; the family name is Sng / Sun.

Stefanie Sun (simplified Chinese: 孙燕姿; traditional Chinese: 孫燕姿; pinyin: Sūn Yàn Zī) is a multi-award-winning C-Pop singer and songwriter. She was born on 1978. Stefanie has sold over 10 million copies in Asia. After her release of her tenth album, she is said to be the most popular Mandarin female singer in Asia and the most successful singer from Singapore.