1) Names with gratuitous letter "y"'s stuck into them sound contrived (not to mention trailer-park). Go conservative and you won't regret it.
2) The quotes around the one girl's name imply this will be the child's "call-name". Decide what you're going to address the child as, and use that as the FIRST name. Saves a lot of grief and confusion later.
3) Many of us here have said it before: "Mac-" means "son of" and Mackenzie is therefore NOT an appropriate first name for a female. Actually, it's really only a good name for a (male) Scottish Terrier. Or a washed-up druggie former child actress who's seen mainly in adult acne infomercials...
4) Having six children could be viewed by many as a bit irresponsible in our day and time, unless you live in Utah or the Gaza Strip.