Majella's usage is only restricted to
Ireland, due to it being the Anglicised form of a saint's surname. It's a pity it's not popular, it has a nice ring to it.
Rosaleen, in this spelling, has never enjoyed of great popularity outside
Ireland neither.
Imogen is a potential example of a British name. It has never cracked the top 1000 names in the US - only the spellings
Imogene and Emogene did.
Nic(h)ola is somewhat common in the British Isles (besides Germany, Poland and the Czech Republic).
Something that surprises me is
Beau being used as a unisex name in the UK whereas it being only masculine in the States. In the latter country, unisex names are popular.
Speaking of
Beau, the elaborated form
Beauden is concentrated in New Zealand.
“Dear optimist, pessimist, and realist – while you guys were busy arguing about the glass of wine, I drank it! Sincerely, the opportunist!”
-Lori Greiner