It looks like the parents here belong to the other John Lloyd and should be detached as well.
But the main problem is that this profile is insufficiently sourced. Research should be done to identify parents and children of the right John Lloyd, and to identify the problematic Mary or determine if she was wrongly attached to the husband given for her. She could be the right Mary but with the wrong spouse, which is why research should be done before detaching people.
I see that the Daniel Tucker figure was an immigrant, which is the point at which spurious attachments are usually made.