Cardhop linking related field to unrelated contacts

I have hundreds of contacts in my address book and many include the names of spouses and children

Image my surprise when I noticed the face of a strange woman displayed next to the name of a friends wife (IOS). All of my contacts that include the names of spouses & children were set up in Contacts.app. Cardhop linked the names of relatives to other contacts in my address book containing the same first name.

Does anyone know how to turn off this linking “feature”? The only solution I have found is to edit each contact card and add the last name to each relative listed.

I don’t like Cardhop enough to do that.