Zayden Rhett - I like Zayden though it may like quirky to plenty of other people, like a concocted American name. I don't think it goes too well with Rhett.
Liam Braxton - okay, Braxton isn't my favorite, but I love Liam.
Spencer Eli - Kind of a odd concoction together
Caspian Blake - sounds fine
Nolan Garrett - normal
Isaac Aiden - interesting
Noah Ryan - reminds me of Nolan Ryan, the baseball player... not bad
Ayla Trinity - not my style
Laurel Jocelyn - seems too long
Karrington Violet - too long
Kelsey Brooklyn/Brooke - Kelsey Brooke
Josie Olivia - Josie seems like a short name for Josephine, Josette... but I suppose you could use it.
Bethany Joelle - I like it. Not a lot of people like the name Beth, just FYI. These names together have good meanings though, which I always like.
Lila Sierra - I like both names, but not so much together, maybe because they both end with "a". Maybe Lila Claire, Lila Rose, Lila Jane, Lila Elise, Lila Paige, Lila Winter.... but ending with "a" like Lila Matilda... etc.. just seems like too many "a's"