With tears in his eyes, Harry triple-checked the array of diamonds. They were gone. Everyone he cared about was gone. At least, Harry reassured himself, Voldemort was gone too. The goblins promised.
Harry checked the arithmancy again. Where Voldemort couldn't return, the ones he cared about the most could. That final battle was much too costly. Ron, Ginny, Hermione. The twins, Neville, Luna.
But, they wouldn't remember who they were when they came back. The whole of wizarding kind re-incarnated, but few knew the truth. Griphook said that was why so many muggle-born were being born, after the wars Voldemort waged. It was why muggles were out-stripping wizards in the population department. Magic was finite, Science wasn't.
Harry checked the array again. It had to be absolutely perfect. Everything else was done, waiting for them to return. Waiting for him as well. Harry had named the next person with his soul as the sole beneficiary in his will. All of his properties would be hidden until then.
There. The last four times he checked the arithmancy it said the same thing. That meant that the last four times he checked the array it was right as far as the arithmancy was concerned. Harry took a sip of Liquid Luck. He looked at the array, then nudged two of the diamonds into a slightly different position.
Harry stood and withdrew from his pockets a crystal that matched the color of his eyes and an owl feather. The transfiguration on his clothing ended and they returned to the stray threads they had been. He stepped into the center of the array, tucked the feather into his hair, and knelt. Carefully, as to not touch the diamonds, Harry laid down, curled up in the small area. Green eyes examined the crystal that matched them. It was thin, and was about four inches longer than the width of his hands combined.
Harry broke the crystal, and the Killing Curse contained within drove his soul from his body. The array glowed, and the soul vanished.
When the goblins arrived two days later, they found that the diamonds of the array had grown around the former Boy-Who-Lived, creating a small shrine protecting his body. They put up powerful protective wards, and one day it would become a pilgrimage site for wizarding kind.
Several hundred years later, the goblins would notice that the Potter will was active. They looked for him, but it was only after the one-year war and the Mariemaia incident that they found him.
Harry Potter had been reborn as a boy now named Duo Maxwell.
Ok, this has been floating around on my computer long enough and looked at enough that I have decided that it's postable. That being said, Yes, I know who each of the G-boys were – and the girls – so please don't make any suggestions. Also, please don't expect any updates any time soon. This was simply written to show another way Harry could be made to also be Duo.
I will consider adoption offers. If I like your plot idea, and you accept my casting (Don't worry, I've only cast 8 former HP characters including Harry.), then I'll be glad to let you adopt. I don't have a plot for this, anyway…
And yes, I'm still working on Purple Eyes of Death. Beating it with a stick, actually. I've got too much fuzz for the period after the Troll incident, and I currently lack a copy of book 1.