No, it is not. Tsang is the Cantonese romanization of the surname 曾, whose Pinyin version is Zeng. When Zang is seen as a surname in mainland China, it refers to another Chinese character, which is 臧, whose Wade-Giles version is Tsang. So, you could see that this surname 臧 is written as Tsang in Taiwan. Here are several examples to illustrate what I mentioned.
Here is a picture of Margie Tsang, or 曾华倩 in Chinese, an actress from Hong Kong.
![](http://chinesespeakingfans.com/wp-content/uploads/2023/06/main-qimg-9d9ee0cf150adb9094409126cc6da107.png)
Here is a picture of Kenneth Tsang, or 曾江 in Chinese, an actor from Hong Kong.
![](http://chinesespeakingfans.com/wp-content/uploads/2023/06/main-qimg-cb8fbf1f7b3844e0fdc85d3dc5cb5f4e.png)
Here is a picture of Zeng Li, or 曾黎 in Chinese, an actress from mainland China.
![](http://chinesespeakingfans.com/wp-content/uploads/2023/06/main-qimg-ca96e8031bf21d54908b8d9ab51f4209.jpg)
Here is a picture of Zeng Mengxue, or 曾梦雪 in Chinese, an actress from mainland China.
![](http://chinesespeakingfans.com/wp-content/uploads/2023/06/main-qimg-a2cf865e11490f0163321f23920cc7eb.jpg)
Here is a picture of Zang Xiaoyu, or 臧晓玉 in Chinese, an actress from mainland China.
![](http://chinesespeakingfans.com/wp-content/uploads/2023/06/main-qimg-ae4b81fe031e96a0939698d9c21bd572.jpg)
Here is a picture of Zang Cong, or 臧聪 in Chinese, a singer from mainland China.
![](http://chinesespeakingfans.com/wp-content/uploads/2023/06/main-qimg-610a361389df138f13cbb0288fd29630.png)
Here is a picture of Tsang Jui-Hsuan, or 臧芮轩 in Chinese, an actress from Taiwan.
![](http://chinesespeakingfans.com/wp-content/uploads/2023/06/main-qimg-89e865ff0be49ab2dc73621b0a6f10f6.jpg)