Middle name for SUnday and Sister sibling

Fairly set on [name]Sunday[/name] for first baby girl.
Need a little help for middle names. Also ideas for a sister sibling.
Originally was set on [name]Sunday[/name] [name]Kate[/name] but now feel that [name]Kate[/name] is a standard mn and a bit boring.
Thought about:
[name]Sunday[/name] [name]Lacey[/name] ([name]Lacey[/name] is my twin sis’ name) but not sure if its too boring.

Some other names I like, to give you an idea on my style to help me pick a middle or sibling name:
[name]Wynter[/name]
[name]Willa[/name]
[name]Winslet[/name]
[name]Indy[/name]
[name]Harper[/name]
[name]Monroe[/name]
landry
I am kind of stuck on liking new names because I feel like ive heard them all over and over

I like the thought behind [name]Lacey[/name], but honestly? [name]Sunday[/name] [name]Lacey[/name] doesn’t have a good flow and it feels [name]WAY[/name] over the top - less like a name and more like something you would wear to church. I think [name]Kate[/name] is PERFECT with [name]Sunday[/name], honestly - it grounds it and makes it sound like a name and not a statement.

Other ideas:

[name]Sunday[/name] [name]Alice[/name]
[name]Sunday[/name] [name]Bridget[/name]
[name]Sunday[/name] [name]Blythe[/name]
[name]Sunday[/name] [name]Liv[/name]
[name]Sunday[/name] [name]Ruth[/name]

I still think [name]Sunday[/name] [name]Kate[/name] is perfection. My first thought for a sister was [name]Bliss[/name].

I love the sound of [name]Sunday[/name] [name]Kate[/name]. (And honestly, I’m still hung up on one of your other combinations…[name]Vivi[/name] [name]Charles[/name]!)

[name]Sunday[/name] [name]Vera[/name]
[name]Sunday[/name] [name]Greer[/name]
[name]Sunday[/name] [name]Quinn[/name]
[name]Sunday[/name] [name]Liza[/name]
[name]Sunday[/name] [name]Reese[/name]
[name]Sunday[/name] [name]Tess[/name]

[name]Sunday[/name] [name]Joelle[/name]
[name]Sunday[/name] [name]Brynna[/name]
[name]Sunday[/name] [name]Alexis[/name]
[name]Sunday[/name] [name]Faith[/name]
[name]Sunday[/name] [name]Emily[/name]
[name]Sunday[/name] [name]Fiona[/name]
[name]Sunday[/name] [name]Jordan[/name]

Of your names, I like [name]Sunday[/name] [name]Monroe[/name] the best!

Other suggestions:
[name]Sunday[/name] [name]Adair[/name]
[name]Sunday[/name] [name]Amara[/name]
[name]Sunday[/name] [name]Helena[/name]
[name]Sunday[/name] [name]Lorelle[/name]
[name]Sunday[/name] [name]Maxine[/name]

Firstly, [name]Sunday[/name] is a brilliant name! [name]Love[/name] it!
I like [name]Sunday[/name] [name]Kate[/name] and I agree that it makes it more of a ‘normal’ name, less wordy, but it’s very heavy on the a’s [name]IMO[/name]. I don’t think it flows quite right. I really like [name]Flick[/name]'s suggestions of [name]Sunday[/name] blythe (Sundays child is [name]Bonny[/name] and [name]Blythe[/name]) and [name]Sunday[/name] [name]Ruth[/name].

What about:
[name]Sunday[/name] [name]Beatrix[/name]
[name]Sunday[/name] [name]Florence[/name]
[name]Sunday[/name] [name]Olive[/name]
[name]Sunday[/name] [name]Violet[/name]
[name]Sunday[/name] [name]Wren[/name]

Also, I think [name]Sunday[/name] [name]Monroe[/name] sounds more like a boy than a girl.

I fell in love with [name_f]Sunday[/name_f] not that long ago and have been searching threads about [name_f]Sunday[/name_f] on nameberry. [name_f]Love[/name_f] it! Looking at the names you like we have a very similar style! I want to name my future daughters [name_u]Winter[/name_u] and [name_f]Sunday[/name_f]!