Current girl favorites

I love coming up with subsets in my head for possible future children, and want some advice on a name/s that fit well with each other. My dream family is four girls, so I usually come up with girls names that go well together though I have a lot of boy favorites too. Right now I have the names [name_f]Magnolia[/name_f] [name_f]Mae[/name_f] ([name_f]Maggie[/name_f]-[name_f]Mae[/name_f]), [name_f]Luella[/name_f] [name_u]Scout[/name_u], and [name_f]Agnes[/name_f] [name_f]Moon[/name_f] ([name_u]Nesta[/name_u]). For the fourth girls name I really want it to end in the -O sound. I love name like [name_f]Margot[/name_f] and [name_u]Marlow[/name_u] but they’re a bit to trendy for me. I really love the name Minnow and would maybe spell it Minou so it didn’t seem as fishy, but I don’t know if it is still too out there? I also really like [name_u]Winslow[/name_u], but would love some more not too trendy, -O ending names. I like [name_f]Rose[/name_f] a lot for a middle name. Thanks!

What about [name_u]Rosario[/name_u]?

Other ideas ~
[name_f]Allegro[/name_f]
[name_u]Calypso[/name_u]
[name_f]Clio[/name_f]
[name_u]Echo[/name_u]
[name_u]Hero[/name_u]
[name_u]Indigo[/name_u]
[name_f]Juno[/name_f]
[name_u]Shiloh[/name_u]

It’s kind of a rare sound for girl name. I think Pp covered it pretty well,

Some other endings

[name_f]Lilou[/name_f]
[name_f]Bijou[/name_f]
Mileu

[name_f]Thisbe[/name_f]
[name_f]Trilby[/name_f]
[name_f]Jovie[/name_f]
[name_u]Josie[/name_u]

[name_f]Sunday[/name_f]
[name_u]Kay[/name_u]
[name_u]Taye[/name_u]