I think all of them sound good with the exception of Ella Kim as I don't think it flows as nicely. The two names kind of run into each other IMO. Plus I also think that the name has become very popular (although nice). But if you don't mind it being very popular, then go for it.
I like the name Abigail (Abby is a nice nickname), Alison is good because it isn't too popular at the moment but isn't too unusual (Ally is a nice nickname). I think Helena and Juliet are lovely names. I am not too keen on Isabella because I think it is pretty popular but that is only my perception and I don't like naming my kids names that are too popular. However, I know that if you really like something and if the popularity of the name doesn't bother you, then you should just stick with that name. All in all, they are all pretty choices.
I like Helena Kim. It sounds important and I can hear people anouncing it IYKWIM?!! Like at a sporting event "here comes Helena Kim, running for Australia" or "Primeminister Helena Kim has just arrived" lol!!
I like 1)- Juliette (very classy and pretty) and 2)- Abigail (nickname Abbey).
Isabella and Ella are nice names but too common now IMO.
Helena & Alison are neither here nor there for me.
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