Contact name in Messages is showing up as a family member's version of the contact

I have a shared MacBook Air running Sequoia.

The rest of my family have Apple IDs and we are all linked together as a family group, with me as the primary ID.

Each group member has a profile on the MacBook.

When I'm using my profile on the MacBook, the messages app doesn't show my wife's name as it does in my contacts (E.G. Sandra) but rather it shows up as Mummy (the name my child has for my wife in her contacts).

How do I get this to show with my version of the contact?