Family names in arena

In arena when ever there is a family with adults with one last name and a child with a different last name (typically a friend's child or family member) the check in app defaults to the child's name. Is there a way to stop this from happening? I've been doing a decent job of making sure kids are moved to their own household but the last name of the child still remains. Is there a way I can run a list that shows me family name and go through them all?

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