[RaggedyAnn]

There probably isn't a rule against it, because when a man lavaliers a woman, he is saying he intends to marry her. If it means that much to your fiance, I would let him do it. Think of it like this...You get married and take your husband's last name (lavalier). You get divorced, but keep the name because of the kids (his fraternity brothers). You get married a second time, what do you do about the last name? Keep the old one? Take a new one?

My husband is in a fraternity and he thinks you should give the old lavalier back. He says it's like being engaged to two guys at the same time, which you can't be. I have to agree. Anything the ex gave you as a gift should be probably be purged and keep anything given to you by the fraternity as a sweetheart.