I second [name_f]Ramona[/name_f], [name_f]Rowena[/name_f] or [name_u]Romy[/name_u].
[name_u]Romilly[/name_u] is lovely too.
hmmm [name_f]Ro[/name_f]…
[name_f]Rhiannon[/name_f]
[name_f]Ambrosia[/name_f]
[name_f]Aphrodite[/name_f]
[name_u]Brooke[/name_u]
[name_f]Bronwyn[/name_f]
[name_f]Caroline[/name_f]
[name_f]Dorothy[/name_f]
[name_u]Monroe[/name_u]
[name_f]Primrose[/name_f]
[name_u]Robin[/name_u]
[name_f]Veronica[/name_f]
[name_u]Rowan[/name_u]
[name_u]Yarrow[/name_u]
There are lots of great suggestions. The name [name_f]Roberta[/name_f] came to mind as well.