Dara seems like it could be a variant spelling of
Tara (at least in some English dialects) and as such I'm pretty sure that some people are going to mistake the name of your friend's daughter for
Tara at first. It could potentially be a pain in the tuchus for her, so then
Daria would be the better option, as the -ee- sound in it will prevent people from mistaking it for
Tara.
"It is no measure of health to be well-adjusted to a profoundly sick society." ~ Jiddu Krishnamurti (1895-1986)