I am not getting the correct sentence for asking the names of all people in a group. I know their nick names and I want to know the actual name of every person in one sentence. 
The sentences which come to my mind are: 

> 
> 1. What are the actual names of yours?
> 2. What are the actual names of you all?
> 3. What are the actual names of your?
> 4. What are the actual names of you people?
> 5. What are the actual names of all of you?
> 
> 
> 

To me all of these sentences are correct. In #1 "*yours*" seems to be doubtful, *your* seem more appropriate. Are these sentences correct? 

I learned somewhere that "*you*" can be used for both *singular* and *plural*. Am I right?  

Please do not explain too technically rather explain by what sense they(the sentences) imply.