Below is a round-up of the birth announcements from British newspapers. Sources include a national paper (The Telegraph, The Times) and a broad range of local newspapers from across England, Wales, Scotland and Northern Ireland.
Sibling names are in brackets. No official surnames are included; any name ending in a surname is actually a middle name.
Boys:
Cosmo Alec (Nell Ryder Cecilia & Polly Clemency)
Gabriel Joshua
Henry James
James Alexander Maximilian
James Robert
Jon Benjamin Fraser (Jacob)
Luke George
Mackenzie "Mackie" Thomas
Matteo
Max Edward Frederick
Oscar George
Rafael Ruben Montgomery (Isabelle Rose Maria)
Rafe Michael de Pelet (Toby Edward Peter)
Rory Alexander Hans (Isabella Kathryn Clare)
Zachariah Ahmad Ian
Girls:
April Ley
Amelia Rose Charlotte (Rupert "Bertie" Philip Richard & William James Alexander)
Annabel Mary Grace (Emily Jane Hope)
Beatrix Rita Pandora
Florence Penelope Jean
Mollie Isla Diana
Olive Violet Eva (Autumn)
(the Hon) Sybil Dinah (Florence Harriet)
I cross-reference older BAs to find the full names of the siblings, however often they are missing (especially the eldest siblings, or for half-siblings) which explains why you will sometimes see something like: George Henry (Lucy, Emma & Jack Arthur). "Lucy" and "Emma" may well have middle names as well; I simply cannot find them online.