After a few suggestions and answers I think we have a name picked. We have a son named [name]Hayden[/name] and are about to have a baby girl.
Here are the names on our list we are still considering. Whats your thought?
[name]Halle[/name]
[name]Lilly[/name]
[name]Alyson[/name]
[name]Alexandra[/name]
[name]Hi[/name]!
[name]Halle[/name] - Cute name with spunk and charm, but I worry you’ll be trapped in a two-syllable H theme, not to mention [name]Hayden[/name] and [name]Halle[/name] could be a bit confusing…
[name]Lilly[/name] - I think that [name]Lilly[/name] (or [name]Lily[/name]) is very sweet with [name]Hayden[/name]! Considering [name]Hayden[/name] is unisex, something girlish like [name]Lily[/name] makes it obvious which child is the girl in your sibling set.
[name]Alyson[/name] - [name]Alyson[/name] feels dated to me, so it wouldn’t be my choice.
[name]Alexandra[/name] - [name]Alexandra[/name] feels like too much name, and too classic of a name, next to the modern and unisex, yet streamlined, [name]Hayden[/name]. If you have something like [name]Hayden[/name] [name]Christopher[/name], perhaps you could use [name]Alexandra[/name] in the middle?
Others you might like to consider include [name]Annis[/name], [name]Bristol[/name], [name]Cara[/name], [name]Claire[/name], [name]Ellis[/name], [name]Grace[/name], [name]Hollis[/name], [name]Isla[/name], [name]Josie[/name], [name]Joely[/name], [name]Kira[/name], [name]Loewy[/name], [name]Lucy[/name], [name]Macy[/name], [name]Mara[/name], [name]Naomi[/name], [name]Piper[/name], [name]Quinn[/name], [name]Regan[/name], [name]Reilly[/name], [name]Rory[/name], [name]Sorcha[/name], [name]Sloane[/name], [name]Seren[/name], [name]Tessa[/name], [name]Tierney[/name], [name]Wynne[/name], [name]Willa[/name], or [name]Willow[/name]…
Good luck!
[name]Lemon[/name] 
I love [name]Lily[/name]! especially w/ [name]Hayden[/name]. [name]Lily[/name] [name]Noelle[/name] is a beautiful name
My favorite is [name]Alexandra[/name], I also like [name]Lilly[/name]. [name]Halle[/name] is so cute and a really good name but I feel that it is too similar to [name]Hayden[/name]. [name]Alexandra[/name] would be adorable, I also like [name]Alessandra[/name].
Congratulations!
I agree! [name]Love[/name] [name]Lily[/name] (spelled with one “l”), [name]Alexandra[/name], and Alessadra.
[name]Hi[/name]! My favorites from your list are [name]Alexandra[/name] and [name]Lilly[/name], and I think they’re great with [name]Hayden[/name].
Good luck!
[name]Alexandra[/name]!
I like [name]Lily[/name] with [name]Hayden[/name].
[name]Lily[/name] [name]Piper[/name]
[name]Lily[/name] [name]Imogen[/name]
[name]Lily[/name] [name]Jane[/name]
[name]Lily[/name] [name]Alexa[/name]
[name]Lilly[/name] fits best with a brother named [name]Hayden[/name].
[name]Lilly[/name] - [name]Favorite[/name] in your set! [name]Lilly[/name] and [name]Hayden[/name] is adorable.
[name]Alexandra[/name] - Second favorite. I agree with the suggestion of [name]Alessandra[/name] to make this somewhat classic name sound a bit fresher next to the very modern [name]Hayden[/name].
[name]Halle[/name] - Alliteration. Not my favorite.
[name]Alyson[/name] - [name]Hayden[/name] and [name]Alyson[/name] both have a y in the middle and the same ending sound, so I don’t think they have the best flow together.