I don't know the names of all of them

[Topstudent]

Dialog:

Man 1: You don't remember him?

Man 2: My company has a lot of employees. I don't know the names of all of them.

Is the bold-faced sentence perfectly correct and natural here?

 

[5jj]

Did your read this dialogue somewhere? If so please tell us the source and author.

 

[Topstudent]

Did your read this dialogue somewhere? If so please tell us the source and author.

Sorry. I wrote it myself.

 

[5jj]

It's fine.

 

[emsr2d2]

I'd use "I don't know all their names" but yours isn't wrong.