I missed they are in 2 columns so concatenate them into a single column first

in C1 =A1&B1

Apply the formula to the concatenated column.

Mike

" wrote:

I have a two columns A with surname and B with first name, but entered
multiple times:

eg:

Smith, John
Smith, John
Smith, Arthur,
Rabbit, Peter,
Rabbit, Peter
Rabbit, Peter

What's the easiest way to total up the number of people there are? In
this case 3.

Thanks