I’m not from [name_m]Australia[/name_m] UK perspective here
I absolutely love [name_f]Romilly[/name_f]! I think [name_f]Romilly[/name_f] is elegant, sleek and distinctive. I really love the connection to [name_m]Rome[/name_m] and would take full advantage of this connection (mini break to [name_m]Rome[/name_m] to celebrate our [name_f]Romilly[/name_f] 
)! I love the nicknames [name_f]Millie[/name_f] & [name_f]Romy[/name_f] as well. I’m using the same pronunciation as @The_Bookwyrm.
I really like [name_f]Lyra[/name_f] & [name_f]Romilly[/name_f] together such a pretty pairing for siblings very starry. I also think [name_f]Romilly[/name_f] [name_f]Lyra[/name_f] or [name_f]Lyra[/name_f] [name_f]Romilly[/name_f] is perfection.
[name_m]Brother[/name_m] names: [name_m]Caspian[/name_m], [name_m]Laszlo[/name_m], [name_m]Gideon[/name_m], [name_m]Florian[/name_m], [name_m]Magnus[/name_m], [name_f]Pascoe[/name_f], [name_m]Etienne[/name_m], [name_m]Moses[/name_m] + [name_m]Philemon[/name_m]
[name_f]Sister[/name_f] names: [name_f]Valentina[/name_f], [name_f]Juliette[/name_f], [name_f]Cordelia[/name_f], [name_f]Evangeline[/name_f], [name_f]Elodie[/name_f], [name_f]Amalia[/name_f], [name_f]Constance[/name_f] + [name_f]Paloma[/name_f]
[name_f]Hope[/name_f] this helps