Just my initial thoughts...
Mirren Rose - Very Old fashioned.
Daniel Luke - Lovely, traditional names.
Arya Catherine - Never heard of Arya, sounds made up (is it something GoTs? Never seen it).
Rory Luke - Lovely, one of my favourites, traditional without being boring.
Lyra Catherine - Lovely, bit unusual combined with traditional, one of my favourites.
Isaac Fraser - Like Isaac, Fraser reminds me of a dog.
Oliver Luke - Very nice, traditional, and love the nn Olly.
Merida Catherine - I like it, although reminds me of the Disney Princess if that's what you're going for.
Luke Fraser - Love Luke, Fraser is a dog.
Linnet Catherine - Never heard of Linnet, but i would have presumed it was a male name, so not keen.
Deliah Rose - Nice, but possibly a bit too flowery?
Merryn Catherine - Old fashioned
Aoiffe Rose - Not keen, just don't like the spelling (and i can never pronounce it)
Jacob Fraser - Jacob is okay, Fraser is a dog.
Christopher Luke - Love it, Christopher doesn't seem to be used much now, but its lovely
Esme Rose - Just okay, bit meh.
Norah Catherine - Qiute old fashioned.
Dawson Fraser - Too American (It's a surname!)
Luna Abigail - Love! Both names are lovely, and slightly unusual without being werid.
Rowan Catherine - I don't like Rowan, i don't think it works well for male or female.
Rowan Fraser - Don't like Rowan, doesn't sound right.
My list
: Daniel Fraser (b) - Daniel nice, Fraser not.
Rory Alexander (b) - Lovely, traditional but slightly unusual
Isaac Hunter (b) - Do not like Hunter, too American (It's a surname!)
Oliver James (b) - Lovely, and i love Olly as a nn
Merida Elisa (g) - Nice, but i prefer Elise or Eliza, i don't really know how to pronounce Elisa.
Luke Alexander (b) - Nice, traditional, lovely.
Seraphina Naomi (g) - Nice, and i like Sera for a nn.
Aoiffe Catherine (g) - Do not like Aoiffe, spelling or pronounciation.
Mirriam Elisa (g) - Too old fashioned.
Christopher (no middle) (b) - Christopher is lovely and underused!
Esme Naomi (g) - Okay, nothing special
Nova Catherine (g) - Nova is okay, a bit unusual compared to your other choices
Nico Hunter (b) - Prefer Nicholas over Nico. Hunter is a surname
Lydia Naomi (g) - Don't like Lydia, too harsh sounding.
Luna Naomi (g) - Love Luna, Naomi is okay
Rowan Fraser (b) - Don't like Rowan for boy or girl