Not sold on the idea, but looking for ideas. I like how [name]Emmett[/name] has 2 E’s 2 M’s and 2 T’s, wondering if anyone has other names with double letters only. Consider it a challenge.
[name]Hannah[/name]! [name]Hannah[/name] is also a palindrome (read the same forwards and backwards). I win the prize!
It would be too matchy for me, but:
[name]Elliott[/name]
[name]Bennett[/name]
[name]Garrett[/name]
Girls (less matchy):
[name]Annabelle[/name]
[name]Connolly[/name] (unisex, but I was desperate)
[name]Merrill[/name] (ditto)
What about names with only one set of doubles?
[name]Anna[/name]
[name]Calla[/name]
[name]Marielle[/name]
[name]Mirabelle[/name]
[name]Nell[/name]
[name]Quinn[/name] (not personally a unisex fan…)
[name]Romilly[/name]
[name]Stella[/name]
[name]Tess[/name]
[name]Tessa[/name]
[name]Willa[/name]
[name]Atticus[/name]
[name]Beckett[/name] (has the same ending, though)
[name]Callum[/name]
[name]Dashiell[/name]
[name]Everett[/name] (too close, though)
[name]Finnegan[/name]
[name]Finnian[/name]
[name]Harrison[/name]
[name]Jefferson[/name]
[name]Kellan[/name]
[name]Maxwell[/name]
[name]Quinn[/name]
[name]Sullivan[/name]
Good luck! 
I think it would be too matchy with some…I’m just going to wing it
What about…
[name]Lily[/name]
[name]Annabel[/name] (cute)
[name]Susannah[/name]
[name]Jemima[/name]
[name]Freya[/name]
[name]Ramona[/name]
[name]Ruth[/name]
[name]Arianna[/name]
[name]Arabella[/name]
[name]Pippa[/name]
[name]Marigold[/name]
[name]Leo[/name]
[name]Victor[/name]
[name]Barnaby[/name]/[name]Barnabas[/name]
just some ideas.
Girls: (I am just going with the challenge, not all suggestions are great!)
[name]Vivianna[/name]
[name]Lilianna[/name] (-^I prefer both these with one n)
[name]Barbara[/name]
[name]Nanette[/name]
[name]Aviva[/name]
[name]Aziza[/name]
[name]Pallas[/name]
[name]Mimi[/name]
[name]Tatyana[/name]
[name]Shoshana[/name]
Boys:
[name]Otto[/name]
[name]Phillip[/name]
Addamm (don’t really spell it like that. [name]Even[/name] the Addam’s Family had just one m).
[name]Donovan[/name] (couple extra letters, still seems balanced like [name]Emmett[/name]).
All in all, a difficult task. Fun trying to think of some that don’t have a lot of letters left over after pairing them up. It’s kind of a neat feature of [name]Emmett[/name], good way to try out some names for balance and “match” names without being obvious.