Attending a Harry Potter-themed wedding party? Why not respect the wedding themes also when you offer them Harry Potter wedding gifts. Here's some Harry Potter merchandise that would be a great idea for the newly wedds.
Harry Potter luggage tags
These luggage tags are not only available in the 4 Hogwarts houses (Gryffindor, Hufflepuff, Raveclaw, Slytherin), but also in Fantastic Beasts.
Harry Potter passport holders
Using Harry Potter passport holders will make the newly-wedds feel like they are traveling with magic.