When to say 你 and when to say 你们?

Hello everybody, I just wrote this:

大家，请告诉我们你们的中文名字，你为什么选择了你的名字？你的名字有特别的意义吗？如果你没有中文名字，是因为你不要还是你还没选择？

Because in English 你 and 你们 both are translated as 'you', I wasn't exactly sure if I should use 你, 你们 or both. In a way, I am talking to a group, but in another way I am speaking to others individually.  How would Chinese people handle it?