I found a website called iannounce.co.uk that lists all birth announcements in the UK. I won't list them all, because there are lots, but I'll go through the first five pages.
Girls
Amelia Louise
Sapphyre Lunna-Mae (sibling: Tyffany-Jayde)
Eilidh Rebecca
Darcey Marie (siblings: Lexie and Iona)
Pippi Jaye (sibling: Tanner)
Georgia Alice (sibling: Harry)
Iona Charlotte
Lucy Elizabeth
Isla Betsy
Darcey Jean (sibling: Corey)
Jessica Alexandra Janet
Emma
Florence Noni Elizabeth
Evelyn Isobel
Madeleine June (sibling: Harry)
Jessica Jayne
Violet Jessie (sibling: Molly)
Sofia Rose
Sophia
Eden Reese
Amelia Faith
Ruby (sibling: Daniel and Lucy)
Phoebe Grace (sibling: Amber)
Boys
Lucas William (siblings: Oliver and Spencer)
Cole David (siblings: Niamh, Fearne, and Orla)
Charlie Ian (sibling: Alfie John)
Harry Jack
Harry (siblings: Isabella and Lily)
Jacob Thomas
Rupert George Bertie
Todd Joseph Leslie Richard (sibling: Grace)
Kodah Ashley (sibling: Lola-Grace)
Joseph William (sibling: Daniel)
Reuben Joe William (sibling: Lenny)
Hunter Daniel Kay (sibling: Connie Olivia)
James Cyril
Tor Ichikawa Jorge
Michael Thomas Lawrence (sibling: Grace)
Evan Gareth (siblings: Catherine and Daniel)
Joseph Alexander (siblings: Jessica and Rhys)
Jacob Isaac
Leighton William George
Samuel Donald
Robin Guy
Zach
Jamie
Samba David
Douglas Michael Scott (sibling: Eilidh)
My favourites are Evelyn Isobel, Sofia Rose, and Harry Jack. My mouth dropped open at Sapphyre Lunna-Mae, and her sister's name is just as bad! Thoughts?