Hello,

I suggest to take my UDF UniqRandInt() from www.sulprobil.com.

If your names are listed in A1:A16, for example, then select cells B1:B25
and enter
=INDEX(A1:A16,UniqRandInt(16,2))
as array-formula (with CTRL+SHIFT+ENTER).

Please keep in mind that my function returns an error value if the length of
your list is less than 16 * 2 as B. R. Ramachandran already pointed out.

HTH,
Bernd