TheDowager is right. Those are names of this decade which will all fall out of favour by 2025.
Beatrice - 91st
Isla - 3rd
Florence - 26th
Margot - 415th
Freya -21st
Isla hasn't got much room to go any higher. Freya already peaked in 2011 at 19th. Florence is just about peaking now. I doubt Beatrice will go much higher - perhaps a little - but not much.
Margot is the only one which has got a way to run yet. Its bang on the latest trend with an ending in -o sound which is being sort as an alternative to the -ie, -ia, -ella and - ells out there. So might peak within the next decade quite well.
I expect in ten years time names 1920s names - like those mentioned above by Sophronia - and names around the 250 - 500 mark currently to be the names that are really catching the imagination in the mid 2020s. Think Diana, Halle, Talia, Hazel.
Henrietta is another (currently down in the high 400s) but it also has the -etta ending which will be a natural successor to the -elle / ella crown together with -ette or shorter -et (its the sound rather than the spelling) and with Henry being a current fav I think it will past over to girls.
And Margaret. Lots of Margarets, Margaretas & Marguerites. As the first generation who won't really remember Thatcher find the name.
All around, it will be a massively less frilly, feminine and flowery feel to today as people get bored of that trend which is really dominating things and want something a little more feisty and 'strong'.
Boys are more difficult. I personally think 'surname names' are here to stay and won't be something that dates in the way many expect - a consequence of globalisation with the internet. Like the girls I think there will be less cute short -ie names in favour of things a little more grown up in sound.
At the 250 mark we currently have with a 1920s vibe with Chester, Laurence & Hector. I also think we will have a bit of a hardman western type thing going on. Wyatt, Archer, Travis, Marshall, Deacon, Clayton.
I also expect regional (Welsh, Irish & Scottish) and ethnic names to do very well in general, with people looking to their roots, a rejection of the politics of our time and a statement of intent.
Oh and lots more shit spellings and hyphens.