No..a gift is a gift!
All gifts should be returned if the wedding is called off regardless of who called it off.
Send them back.
Gifts for a couple who are celebrating an engagement can be good 'looking forward' gifts such as things for their new home. Otherwise a lovely gift is a good quality bottle of champagne.
Gifts are not customary at an engagement party because they are expected at the wedding and etiquette dictates that those who are invited to an engagement party should be invited to the wedding. If you choose to give a gift you can but it is not required or expected.
There are lots of pages that offer engagement gifts. The couples might even suggest what they need for their wedding using an online registry that online stores offer.
If by 'property' you mean your engagement ring, then no, the ex fiance keeps the ring, but if it is a family heirloom she should give it back, but does not have to. Any gifts that were given to her by her fiancee such as jewelry; cash; furniture, etc., is also hers to keep. If the engaged couple are given a piece of property and the wedding is called off then the groom will have to give the property back as long as there is no deed involved with his name on it.
There are many options to give a couple as an engagement gift besides personalized glasses. You can do money, which is one of the best gifts to get ever.
If the gifts are engagement rings, then yes.
I would recomend buying a diamond necklace or an expensive charm bracelet. Good luck on your engagement
It's not happening. Although Hamlet makes love-overtures to Ophelia and sends her letters and gifts, it never gets so far as an actual engagement which would require the public approval of the parents. Had the subject been raised, we know that Gertrude would have been for it. Unfortunately, Polonius puts a stop to their relationship before it gets to the engagement stage.
NO they were gifts!
Unless it is the bride and groom putting on their own engagement party then they get the engagement gifts anyway. However, if it is a parent of either side of the family; relative or friend that puts on the part (they are the hostess) you do not give a gift and only need to give the future bride and groom a gift.