Merge duplicates If you have duplicate listings for the same person in Google Contacts, you can merge them.
Go to Google Contacts. On the left, click Duplicates. If you don’t see Duplicates, go to merge contacts in old Contacts. In the top right, click Merge all. Or, review each duplicate and click Merge.
- Go to https://contacts.google.com/
- Select contacts to merge &
- Click Branch Sign as shown in figure below: