Is there a way to get a list of individuals with a specific surname with an unknown father since in some cases I know the father’s surname but not his given name? For example, I have several cases of siblings with the same surname, but I do not know their father’s given name.
I can’t think of a filter, other than using the Couple List view on the People page. Sort on Father and go to the surname to see who doesn’t have a given name. If you have the Family tab visible in the sidebar you can see if they have children. Switch to the group tab in the sidebar to add the father to a group. Later go back to the group of unknown fathers and check to add their children to the group.