Which sibling duo? and middle name suggestions

Name Advice
1

What do you prefer:

[name_f]Violet[/name_f] & [name_m]Felix[/name_m]

[name_f]Willa[/name_f] & [name_u]River[/name_u] (b)

Can you suggest any middle names? I’m totally stuck between styles

[name_f]Violet[/name_f] [name_f]Mila[/name_f]
[name_f]Violet[/name_f] [name_u]James[/name_u]
[name_f]Violet[/name_f] [name_f]Eva[/name_f]/[name_f]Evie[/name_f]

[name_m]Felix[/name_m] [name_u]Everett[/name_u]
[name_m]Felix[/name_m] [name_u]Mars[/name_u]
[name_m]Felix[/name_m] [name_m]Kasper[/name_m]
[name_m]Felix[/name_m] [name_u]Jules[/name_u]

[name_f]Willa[/name_f] [name_f]Lark[/name_f]
[name_f]Willa[/name_f] [name_f]Kate[/name_f]/[name_f]Katherine[/name_f]
[name_f]Willa[/name_f] [name_u]Lennox[/name_u]

[name_u]River[/name_u] [name_m]Hayes[/name_m]
[name_u]River[/name_u] [name_m]Rhodes[/name_m]

idk…?

2

The only middle name I like for [name_f]Violet[/name_f] is [name_u]James[/name_u].

I would’ve actually gone with willa and [name_m]Felix[/name_m] & [name_f]Violet[/name_f] and [name_u]River[/name_u]