I’m trying to figure out which one of these Hyphenated ‘[name_f]Grace[/name_f]’ names to use for my future baby girl, also which would go best with my last name: [name_u]Wren[/name_u] -
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Since the -[name_f]Grace[/name_f] adds a cuteness factor, I’d probably go with a more elegant or sophisticated fn. So from your list, I’d use: [name_f]Lydia[/name_f]-[name_f]Grace[/name_f], [name_f]Olivia[/name_f]-[name_f]Grace[/name_f], or [name_f]Sophia[/name_f]-[name_f]Grace[/name_f].
Some other names you might like:
[name_f]Aurelia[/name_f]-[name_f]Grace[/name_f]
[name_f]Audrey[/name_f]-[name_f]Grace[/name_f]
[name_f]Aurora[/name_f]-[name_f]Grace[/name_f]
[name_f]Bryony[/name_f]-[name_f]Grace[/name_f]
[name_f]Catherine[/name_f]-[name_f]Grace[/name_f]
[name_f]Chloe[/name_f]-[name_f]Grace[/name_f]
[name_f]Clara[/name_f]-[name_f]Grace[/name_f]
[name_f]Daphne[/name_f]-[name_f]Grace[/name_f]
[name_u]Evelyn[/name_u]-[name_f]Grace[/name_f]
[name_f]Fiona[/name_f]-[name_f]Grace[/name_f]
[name_f]Helen[/name_f]-[name_f]Grace[/name_f]
[name_f]Hermione[/name_f]-[name_f]Grace[/name_f]
[name_f]Ida[/name_f]-[name_f]Grace[/name_f]
[name_f]Julia[/name_f]-[name_f]Grace[/name_f]
[name_f]Laurel[/name_f]-[name_f]Grace[/name_f]
[name_f]Leonie[/name_f]-[name_f]Grace[/name_f]
[name_f]Miranda[/name_f]-[name_f]Grace[/name_f]
[name_f]Nora[/name_f]-[name_f]Grace[/name_f]
[name_f]Phoebe[/name_f]-[name_f]Grace[/name_f]
[name_f]Ramona[/name_f]-[name_f]Grace[/name_f]
[name_f]Susannah[/name_f]-[name_f]Grace[/name_f]
[name_f]Sylvia[/name_f]-[name_f]Grace[/name_f]
[name_f]Tabitha[/name_f]-[name_f]Grace[/name_f]
[name_u]Vivian[/name_u]-[name_f]Grace[/name_f]
[name_f]Zoe[/name_f]-[name_f]Grace[/name_f]
I love [name_f]Lydia[/name_f]-[name_f]Grace[/name_f]! So pretty 
My favourites are [name_f]Olivia[/name_f]-[name_f]Grace[/name_f] and [name_f]Sophia[/name_f]-[name_f]Grace[/name_f] with [name_u]Wren[/name_u]. I also like [name_u]Ruby[/name_u]-[name_f]Grace[/name_f] and [name_f]Willow[/name_f]-[name_f]Grace[/name_f] but I don’t like them with [name_u]Wren[/name_u].
I love [name_f]Olivia[/name_f]-[name_f]Grace[/name_f]. Second choice would be [name_f]Evie[/name_f]-[name_f]Grace[/name_f]! I agree that [name_u]Ruby[/name_u] [name_u]Wren[/name_u] feels like a bit of a mouthful.
[name_f]Lydia[/name_f]-[name_f]Grace[/name_f] and [name_u]Ruby[/name_u]-[name_f]Grace[/name_f] are my favorites.
[name_f]Sophia[/name_f]-[name_f]Grace[/name_f], [name_f]Olivia[/name_f]-[name_f]Grace[/name_f], and [name_f]Ebony[/name_f]-[name_f]Grace[/name_f] stand out to me. 
They have a nice balance of strength and cuteness. [name_f]Sophia[/name_f] and [name_f]Ebony[/name_f] work really well with your last name.
[name_u]Ruby[/name_u]-[name_f]Grace[/name_f] and [name_f]Olivia[/name_f]-[name_f]Grace[/name_f] are my favourites from your list. [name_f]Sophia[/name_f]-[name_f]Grace[/name_f] is also pretty.
I was almost going to be named [name_f]Sarah[/name_f]-[name_f]Grace[/name_f] but then my parents changed their minds.
Not sure if you were after suggestions but here’s some anyhow:
[name_f]Tessa[/name_f]-[name_f]Grace[/name_f]
[name_f]Ava[/name_f]-[name_f]Grace[/name_f]
[name_f]Adella[/name_f]-[name_f]Grace[/name_f]
[name_f]Stella[/name_f]-[name_f]Grace[/name_f]
[name_f]Amelia[/name_f]-[name_f]Grace[/name_f]
[name_f]Emilia[/name_f]-[name_f]Grace[/name_f]
[name_f]Isabella[/name_f]-[name_f]Grace[/name_f]
[name_f]Nora[/name_f]-[name_f]Grace[/name_f]
[name_u]Harper[/name_u]-[name_f]Grace[/name_f]
[name_f]Hannah[/name_f]-[name_f]Grace[/name_f]
[name_f]Lila[/name_f]-[name_f]Grace[/name_f]
[name_f]Liana[/name_f]-[name_f]Grace[/name_f]
[name_u]Tracey[/name_u]-[name_f]Grace[/name_f]
[name_u]Madison[/name_u]-[name_f]Grace[/name_f]
[name_f]Madelyn[/name_f]-[name_f]Grace[/name_f]
[name_f]Jessica[/name_f]-[name_f]Grace[/name_f]
[name_f]Lacey[/name_f]-[name_f]Grace[/name_f]
[name_u]Angel[/name_u]-[name_f]Grace[/name_f]
[name_f]Anna[/name_f]-[name_f]Grace[/name_f]
[name_f]Amelie[/name_f]-[name_f]Grace[/name_f]
[name_f]Lara[/name_f]-[name_f]Grace[/name_f]
[name_f]Kara[/name_f]-[name_f]Grace[/name_f]
[name_u]Riley[/name_u]-[name_f]Grace[/name_f]
[name_f]April[/name_f]-[name_f]Grace[/name_f]
[name_u]Aubrey[/name_u]-[name_f]Grace[/name_f]
[name_f]Sienna[/name_f]-[name_f]Grace[/name_f]
[name_u]Brooklyn[/name_u]-[name_f]Grace[/name_f]
[name_f]Megan[/name_f]-[name_f]Grace[/name_f]
[name_f]Kyah[/name_f]-[name_f]Grace[/name_f]
I think they’re all so much more lovely without the hyphen. But carry on …
I like [name_f]Lydia[/name_f]-[name_f]Grace[/name_f] and [name_f]Willow[/name_f]-[name_f]Grace[/name_f]
[name_f]Ebony[/name_f]-[name_f]Grace[/name_f] and [name_f]Evie[/name_f]-[name_f]Grace[/name_f] are unique and lovely!
[name_u]Ruby[/name_u]-[name_f]Grace[/name_f], [name_f]Evie[/name_f]-[name_f]Grace[/name_f] and [name_f]Poppy[/name_f]-[name_f]Grace[/name_f] are my favourites! Have you thought of [name_f]Millie[/name_f]-[name_f]Grace[/name_f], [name_f]Lily[/name_f]-[name_f]Grace[/name_f] or [name_f]Ella[/name_f]-[name_f]Grace[/name_f]?
I like [name_u]Ruby[/name_u]-[name_f]Grace[/name_f] and [name_f]Sophia[/name_f]-[name_f]Grace[/name_f], but I think [name_f]Sophia[/name_f] works better with your surname than [name_u]Ruby[/name_u]. I also like the suggestion of [name_f]Lily[/name_f]-[name_f]Grace[/name_f] and [name_f]Ella[/name_f]-[name_f]Grace[/name_f].
From your list I like Ruby Grace best, mind you I would not use a hyphen, looks much better without it.
What about Georgia Grace? You could call her by the adorable nickname GiGi.
[name_f]Mary[/name_f]-[name_f]Grace[/name_f]! That’s my name! (Although I don’t spell it with a hyphen.)
[name_f]Lucy[/name_f]-[name_f]Grace[/name_f] is one of my favorites!
I dont feel [name_f]Belle[/name_f]-[name_f]Grace[/name_f] flows properly, as the emphasis is hard to determine, and either way sounds slightly off. My favourite of those listed is [name_f]Olivia[/name_f]-[name_f]Grace[/name_f], though I might go for [name_f]Livia[/name_f]-[name_f]Grace[/name_f]. But what I immediately thought of when I saw the title was [name_f]Amity[/name_f]-[name_f]Grace[/name_f], which you may feel is slightly over the top with the virtue, but [name_f]Amity[/name_f] is not generally used as a word, so I think its fine - and it sounds really pretty.