Sometimes you might see the name of your friend twice in the People -app. Duplicates like these can be bunched up into a single contact by "linking" them:
1. Open the People app
2. Open up the contact card of a person you want to link with another instance of the same person
3. From the pulley menu above, select "Link"
4. Your Jolla will make some suggestions, choose the one most appropriate
5. If Jolla can't guess the right contacts, select "Add more links" from the pulley menu at the top of the screen.