Melva, we just helped another person with, I think, a similar question in our team. If you wish to do unsourced profiles with a particular LNAB, last name at birth, type that name in at the top of any profile and click the icon beside it. That will take you toa family name page. In the selections in
the top paragraph select unsourced. That should provide you with the list of unsourced profile for a single name.