The short answer is you can't. Oracle has nested tables, but MS SQL server doesn't.
If you describe why you want this / what are you trying to achieve perhaps we can find you with an alternative (like 6 columns in your employee table that you concatenate in a view or a second table that will hold your name data).
Depending on the need/application you could use a varchar field that would separate "fields" with a specific char and then either use charindex or split into an array from the front end or store XML into the field or ... , but not of these are a nested table.
If you're in one of those predicaments where cls.__private attributes just aren't enough since they can easily be accessed through inst._cls__private, and you need something a little more secure, here's ...