My brother and I both have 2 middle names as our parents liked the flow of them together. We gave our daughter 2 middle names, one was my fave name and one was hubby's. We couldn't decide the order to put them in as we liked them both equally, then we found another name in a book and liked it even more, so we used both our favourites in the middle. We found one order flowed better than the other.
However, to make it "fair" we have decided to give this one 2 middle names as well, and it has been a nightmare trying to find something we love that flows well, but I think we've done it!