Thanks for your response, @JHenry9!
The form name in that notification email looks like it might be a non-HubSpot form (more info on those in this Knowledge Base article). You can designate submission notification recipients for non-HubSpot forms, but that’s actually not within the overall notifications page!
If you head to Settings > Marketing > Forms > Non-HubSpot Forms tab, you should be able to see if non-HubSpot forms are enabled and, if so, the email address(es) set to receive email notifications for new submissions. You can either toggle off non-Hubspot forms entirely if you don’t need them, or you can remove the needed notification recipients:
Hope this helps!!