I love
Riley equally on both genders. Unusable for me now, thanks to my cousin who named her son
Riley Michael :p
Mn suggestions (some of my own, some going by your PNL):
Riley PearlRiley TessRiley JaneRiley AdelaideRiley AlyssaRiley Faith
Riley EliotRiley MatthewRiley ShaunRiley MattiasRiley AlexanderRiley WilliamRiley Sloan
Unsure as to which gender you prefer
Madison for, but I really like the sound of
Riley Madison :)