Huang Youzuo, Huang Zuoyou.
1. My sister’s name is Huang Youzuo, and Zuo is the elder sister. In traditional culture, Zuo is the eldest.
2. The younger brother is called Huang Zuoyou, and You is the younger brother. In the traditional way, Zhongyou is the younger brother.
The names Yuzuo and Zuoyu mean that the two sisters love each other and support each other, growing up healthily and happily together!