Look at the letters and guess the names.

Jade, Yang, Yi, Ye, Yin, Yong, Yan, Yan, Fish, Yue, Yang, Yan and Yue.

You, Yu, Yun, Yu, Yuan, Yin, Yue, Yu, Yin, Yao, Yu, Yan, Yu, Ying, Yu, Ya, Yan.

Yes, I've said all the surnames that start with Y. As for ZW, it's hard to guess.