For men: Wu Siyu or Yu are both good. Wu Sibo, Wu Sijian, Wu Sikai, Wu Silin, Wu Siwen, Wu Sichang, Wu Sixiang, Wu Sixi, Wu Sihao, Wu Sihao or Hao, Wu Sichen. Wu Sixi, many,,,
Women: Wu Sisi, Wu Siyu, Wu Sinian, Wu Siling, Wu Sili or Li, Wu Silu, Wu Sixen, Wu Sixi, Wu Si'e, Wu Sinen, Wu Sizi, Wu Siyi, Wu Sixin or Xin, Wu Siai...
Thought about it all afternoon,,