I'm trying to fill in siblings of direct ancestors, and others in my watchlist, and think it would be handy to be able to get a list of all the people in my watchlist who have only one or two children listed. Ideally it would help to be able to sort by the age at death, marital status, number of children, etc. This would allow me to focus on specific family units to determine if all the siblings are accounted for.
Is there a way to perform this kind of search on WikiTree?