How do I clear out multiple entries for a persons name in the Faces selection?

Can I get some help clearing up multiple entries in the "Click to Name" dialog box in iPhone 9.6?

Here's the behavior I'm seeing:

When I try to assign a name to a Face by clicking the "Click to Name" option, I start typing in my son's name and iPhone is showing me 15 entries for his name.

Of the 15 options, only 1 of them shows a mini-thumbnail photo of him, and a different one suggests that it's from the Contacts app, but the rest of them are blank.

This behavior is not happening for any of the other Faces in the library.

In terms of troubleshooting, I've opened Apple Contacts and ensured there is only 1 contact record for him (there are 2 email address listed). I've selected Library > Faces > And I see one polaroid image in the list for my son. In the past if there were multiple listings here I've seen similar results. I'm not sure what else to try.

What causes these to be duplicated?