Alexia is a word in its own right, that describes someone with an inability to understand written language. Yes, similar to dyslexia; they come from the same root word. How common this world is to the general population, I don't know. As an optometrist, I'm certainly familiar with the term and to me,
Alexia seems like a very ignorant and inappropriate name. I think it's awful.
http://cancerweb.ncl.ac.uk/cgi-bin/omd?query=alexia&action=Search+OMD
Juliana is ok, I prefer
Julia though.
Juliana is a little fussy and frilly imo.
Julia has more of a simple, classic beauty.