You didn't add the tech tag though you added the other two, but nearly four years on no answer is forthcoming,
I have the same problem. Without a solution to this it looks like we need a work around,
What I thought would work is to make a free space page for each surname and link them all with an overall free space page describing the incident. The summary page need have no surname tags, just links to the sub pages for each family. The sub pages would have have the appropriate family tag link. This solution is more work for us, uses more server space, but would get round the restriction.