Sorting question

I have a spreadsheet over 16,000 rows long. One column header is titled Customer Name. The spreadsheet represents orders our customers have placed. I would like to sort the spreadsheet to return a list of only those customers who placed only a single order and therefore have only 1 row with their name in the customer name column. Is there a quick way to sort for these customers with only 1 entry??

Thanks!

I'm not the expert of others here, but seems like a pivot table could count the times the customer name appears, and could be sorted for just the 1's.

Does the attached help? ( using a named range called list)
Formula is an array formula entered with Ctrl+Shift+Enter