With four brothers I would avoid unisex names and, like you said, I would try to avoid “n” names so Krew doesn’t feel left out.
[name]Isla[/name] [name]Cecelia[/name] (love but afraid to popular) [name]Brown[/name] - I don’t think this is too popular. It’s pretty and feminine and it’s gotten to the point where it’s recognizable but it’s not insanely popular. It’s only in the 300s and I don’t see it in the top 10 ever, and I doubt it will break top 100 anytime soon. It did jump a lot last year but I think that was due to celeb associations, and those don’t usually last very long. [name]Isla[/name] [name]Cecilia[/name] [name]Brown[/name] flows beautiful and [name]Isla[/name] has the same Gaelic flavor as your other names, without ending in N. Perfect!
Copeland [name]Cecelia[/name] (not sure of the double C’s) [name]Brown[/name] - I’m not a fan of Copeland, especially on a girl. It sounds very masculine to me. It also doesn’t seem to fit with your boys names.
[name]Lennon[/name] [name]Cecelia[/name] (love the name but hate that it ends in “on”) [name]Brown[/name] - I like [name]Lennon[/name] on a boy. I don’t love it on a girl. It does end in N (and is two syllables like your other N-ending names), which works against it and also with brothers [name]Aiden[/name] [name]Declan[/name] [name]Rowan[/name] and Krew I would definitely think [name]Lennon[/name] was a boy.
[name]Wren[/name] [name]Cecelia[/name] [name]Brown[/name] - I really love the name [name]Wren[/name] but [name]Wren[/name] [name]Brown[/name] really doesn’t flow well to me. They are both one syllable and end in N. I know that’s being kind of picky but it’s important to factor in flow.
[name]Greer[/name] [name]Cecelia[/name] (DH does not love) [name]Brown[/name] - I like this a lot. [name]Greer[/name] is unisex but is mostly associated with girls now that celebs have used it on girls. [name]Greer[/name] [name]Brown[/name] flows nicely despite the 1-1 fn/ln flow. If you can get your DH to love it, I would say go with this name, it’s not too popular and its not too girly with your boys names but I think most would think that [name]Greer[/name] is a girl.
[name]Bay[/name] [name]Cecelia[/name] (not sure last name goes with it) [name]Brown[/name] - [name]Bay[/name] [name]Brown[/name] sounds like the inverted name of a place ([name]Brown[/name] [name]Bay[/name]). [name]Bay[/name] is cute but I would also avoid wordy names with Krew. Not my favorite on your list.
[name]Blythe[/name] [name]Cecelia[/name] (again not sure I like with last name) [name]Brown[/name] - I actually like [name]Blythe[/name] [name]Brown[/name]. I think it’s spunky and cool. I love that it doesn’t end in N and it’s not super girly but still feminine and strong. If you’re worried about the popularity of [name]Isla[/name] and your DH won’t go for [name]Greer[/name], then I say choose this!
My favorites are [name]Isla[/name], [name]Greer[/name] and [name]Blythe[/name] (in that order). [name]Hope[/name] that helps!