If you like [name_m]Ross[/name_m], what about [name_m]Roscoe[/name_m]? I also like [name_m]Ambrose[/name_m] as suggested by @persephonescrown[name_f][/name_f] above
[name_f][/name_f][name_m]Other[/name_m] ideas… (less related to floral but short R names in general)
[name_f][/name_f][name_m]Rhys[/name_m] / [name_f]Reese[/name_f]
[name_f][/name_f][name_m]Ronan[/name_m]
[name_f][/name_f][name_m]Rory[/name_m]
[name_f][/name_f][name_m]Roswell[/name_m]
[name_f][/name_f][name_m]Ralph[/name_m]
[name_f][/name_f][name_m]Rufus[/name_m]
[name_f][/name_f][name_m]Russell[/name_m]
For long E names, perhaps..
[name_f][/name_f][name_m]Elijah[/name_m]
[name_f][/name_f][name_m]Elias[/name_m]
[name_f][/name_f][name_m]Edmund[/name_m]
[name_f][/name_f][name_m]Eleazar[/name_m]
[name_f][/name_f][name_m]Emerson[/name_m]
[name_f][/name_f][name_m]Ebenezer[/name_m]
[name_f][/name_f][name_m]Emmanuel[/name_m]
[name_f][/name_f][name_m]Emiliano[/name_m]
[name_f][/name_f][name_m]Endymion[/name_m]
[name_f][/name_f][name_m]Ezekiel[/name_m]