I'm taking:-
Romeo - too much associate with lover boy
River - water mass I don't like it as a name much
Rocco - this doesn't sound like it could be the name of an actual person, more an animal/pet name
RafaelRamonRandallRaphaelRaulRaymondRaymundoReeceReedReidReilly
ReneReubenRey
ReynaldoRhettRhysRicardoRichardRickyRileyRishi RobertoRodneyRodolfoRodrigoRogelioRogerRohanRolandRolandoRomanRonaldoRonanRossRowanRoyRyanRylan
Laughter is part of the human survival kit.
-David Nathan