[name]Riley[/name] is nice, but I can’t get my head around it being a girls name. That may just be because it’s unusual in the UK though. If you like it, go for it, it certainly has a nicer meaning than [name]Kennedy[/name] and of the two lends itself to being a female name a little better.
I think the first person to reply suggested “[name]Brynn[/name]”. Being Welsh myself, [name]Bryn[/name](correct spelling) is 100% a boys name.