Ooo for double R I might do:
[name_f][/name_f][name_f]Riley[/name_f] [name_m]Rhodes[/name_m]
[name_f][/name_f][name_m]Rhett[/name_m] [name_m]Royce[/name_m]
[name_f][/name_f][name_f]Ripley[/name_f] [name_f]Raven[/name_f]
[name_f][/name_f][name_m]Ross[/name_m] [name_m]Rogue[/name_m]
[name_f][/name_f][name_m]Robin[/name_m] [name_f]Riley[/name_f] /Riley [name_m]Robin[/name_m]
[name_f][/name_f][name_m]Ronan[/name_m] [name_m]Roy[/name_m]
Others:
[name_f][/name_f][name_m]Rory[/name_m] [name_m]Forrest[/name_m]
[name_f][/name_f][name_f]Sage[/name_f] [name_m]Rhodes[/name_m]
[name_f][/name_f][name_m]Tristan[/name_m] [name_m]Alder[/name_m]
[name_f][/name_f][name_m]Prescott[/name_m] [name_m]Matthias[/name_m]
[name_f][/name_f][name_m]Wendell[/name_m] [name_m]Orion[/name_m]
[name_f][/name_f][name_m]Linden[/name_m] [name_m]Frederick[/name_m]
Hopefully these help!