I like both names (although I prefer the spelling
Finlay). My only concern about using them would be that they are increasingly being used on girls, so they may begin to take on a feminine feel which was never there before.
I prefer
Rowan to
Finley so I would keep
Rowan in the fn spot.
Rowan Finley or
Rowan Finley George both flow well as combos. From the other names in your sig:
Rowan Lucas GeorgeRowan JamesFinley Caleb GeorgeRowan Alexander George
Sophie