Can someone please help me out with holiday wish list etiquette?

A few members of my family have sent me holiday wish lists this Christmas season. Unfortunately, they didn’t send me the lists until after I had already bought gifts for them. Am I obligated to return the gifts I bought and get each person something else that’s on their wish list? My tendency is to treat wish lists as suggestions, and use them for inspiration but not necessarily get the exact item(s) on the list. Although I have sent out my holiday wish list to those who asked for it, I wouldn’t mind if they ad-libbed and got me something that wasn’t on the list. But I realize that maybe not everyone feels that way and I want the recipients to be happy with their gifts. So, fellow jellies, what would you do in this situation?