Memorial Mistake

What if two people who died on 9/11 had the same name?
When the annual memorial event organizers read the list of names in alphabetical order, would they say the same name twice? Or just once?
And when they made the memorial, would they engrave the name twice or just once?
It would be embarrassing to go there to make a charcoal rubbing of your loved one’s name, only to find strangers standing there doing a charcoal rubbing of your loved one’s name?
Or, I suppose, release chickens with the numbers one through nine on them, minus the seven.