Ok I'm not much help here, my favourite boys names right now are, Ethan Finn Tom and Ellis.....Ellis being my fav fav fav fav name,,,,,,, but DH hates it....
I just told him your DS name Elias and he loves it......obviously Ellis is close so maybe we have a compromise.
With regards to uncommon boys names might be Common where I am like....Tadgh (tag) Oran, Finn, Conall, Oscar, Aidan, but uncommon where you live?
Also maybe, Lachlan, Tate, Rex, are uncommon where I am?