Hi Karon! No, don’t do a duplicate. You can edit a profile to add a relationship to an existing profile. For example, if you find a parent of one of your profiles in WikiTree, click the “Add parent” button on your profile. At the top of the edit page you will see a place to enter a profile ID.
A.) If the father has an existing WikiTree profile enter their WikiTree ID here:
Right beside the box, you’ll see a button “Go.” Click on that and it will add the parent. You can do this for siblings and children, too.