Here's how to get rid of duplicate contacts by merging them in iCloud. 1. Open your Address Book on your Mac or your iOS device. 2. Go to Card then Duplicate Contacts. 3. If duplicate contacts are found click or tap on the Merge button. 4. This will merge all of the duplicate contacts and sync them back to iCloud.
For more, see the original article at the link below.
3 Best Tips And Tricks For iCloud | PCs Place