Respondents: 50 (This poll is closed)
I voted for [name_u]Harper[/name_u] for a last name with a T, my second choice would be [name_f]Scarlett[/name_f], although it might not flow as well depending on what your last name is.
Personal style aside, I cannot recommend a misspelled name. I patently disagree with butchering a name for the sake of creativity.
I like [name_f]Scarlett[/name_f]. [name_u]Harper[/name_u] is trendy enough that she will not be alone, but is not my style.
I am not a fan of [name_u]Sawyer[/name_u] or [name_u]Rowan[/name_u] on girls. I very much dislike [name_u]Campbell[/name_u].
[name_f]Eliana[/name_f] is sweet and fits in with trends, but I dislike [name_f]Elliana[/name_f].
Ellara is misspelled. [name_f]Elara[/name_f] is from Greek Mythology. It is obscure enough in mythology and fits in sound wise with current [name_f]El[/name_f] trends such that it could make an intriguing choice.
Brynnleigh is a misspelling of [name_u]Brinley[/name_u]. [name_u]Brinley[/name_u] is far too trendy for my tastes. [name_f]Brynn[/name_f] and -lee/ley names are very popular.
[name_u]Peyton[/name_u] is the classic spelling, although girls commonly get the variant [name_u]Payton[/name_u]. [name_m]Peighton[/name_m] is misspelled. The name is not my style, but I would only recommend using if it is spelled [name_u]Peyton[/name_u].
I voted for [name_u]Rowan[/name_u] , [name_u]Campbell[/name_u] , [name_f]Elliana[/name_f] , [name_u]Sawyer[/name_u] and [name_u]Brinley[/name_u].
Ps. Would [name_u]Flynn[/name_u] , [name_f]Cypress[/name_f] or [name_u]Rory[/name_u] be of interest?
[name_f]Elara[/name_f] is very pretty, but I only like this spelling 
I like the name [name_u]Harper[/name_u] a lot and don’t mind [name_u]Rowan[/name_u] on a girl unless it has an obviously girl middle name, [name_u]Rowan[/name_u] [name_f]Scarlett[/name_f] sounds lovely as does [name_u]Rowan[/name_u] [name_f]Elara[/name_f] or [name_u]Rowan[/name_u] [name_f]Eliana[/name_f] (these spellings). I honestly would run from complicated made-up spellings like Brynnleigh and such because they will just be a hassle to your child and you in the future in terms of having others spell and pronounce it right… it is also very trendy and not in an attractive way like I feel the [name_f]El[/name_f]- names are.
That being said in terms of personal taste I am not a fan of [name_u]Peyton[/name_u] (or her weird variant spellings), [name_u]Campbell[/name_u] (like the canned soup?!) and [name_u]Sawyer[/name_u]. I don’t even like them on boys.
My top names for you:
I really love [name_f]Elliana[/name_f]. I think it has a soft, melodic sound and fits great with a T- last name. I don’t suggest Brynnleigh, it sounds very made-up and trendy.
[name_f]Scarlett[/name_f] is the only name from your list that I like on a girl. Ellara is new to me, but very pretty. So I vote [name_f]Scarlett[/name_f] or Ellara.
I voted for Ellara, [name_f]Elliana[/name_f], and [name_u]Rowan[/name_u]. However, I much prefer the [name_f]Elara[/name_f] and [name_f]Eliana[/name_f] spellings! Particularly since [name_f]Eliana[/name_f] is a pretty established name and most people would end up spelling it that way initially before being corrected. I love [name_f]Elara[/name_f] and [name_f]Eliana[/name_f], they’re both lovely :). I like [name_u]Rowan[/name_u] on both boys and girls, and since you seem to like unisex names I think it would be a good option for you as well.
Other honest opinions:
[name_f]Scarlett[/name_f] is a bad idea if your last name begins with a T. [name_u]Campbell[/name_u] is a soup, and most people will make that association. Brynnleigh is a spelling you will definitely end up regretting in a few years after repeating it a million times (and she might get frustrated with it as well). Not fond of the rest of the names on your list, sorry.