Nora [name_f]Grace[/name_f]. Elegant and timeless.
[name_f]Nora[/name_f] is a lovely choice - sweet with vintage vibes 
For me, [name_f]Nora[/name_f] [name_f]Grace[/name_f] flows better, whereas the repeated ending sound in [name_f]Nora[/name_f] [name_u]River[/name_u] creates a slight clunk (in Australia, we’d pronounce it as “nor-uh riv-uh”, but you may not have this depending on where you live). That said, I love [name_u]River[/name_u] so much that I’d probably go for it anyway! I feel [name_f]Grace[/name_f] is very over used.
This is exactly my feelings on Grace 