Wow! How exciting!
With your girls, I like more or less all your girl list - Amabel, Edith, Matilda, Rosamund, Tallulah & Violet stand out. I’m not a big Dorothy nor Felicity fan and I’d prefer Marguerite to Margaret for a first (though either way, I love Daisy & Peggy!). I really like Imogen & Hermione too but they’re quite close to Jemima - ie Mimi/Mymie names? And Sybil might be too close to Cecily for me (or I would try for own starting sound first, and break rule of all time fave).
Some names, with some Dutchies in there:
Edith Josephine
Matilda Beatrice
Amabel Claire
Imogen Clara
Leonore Charlotte
Adelaide Margaret
Harriet Lucille
Daphne Frances
Marigold Helena
Tabitha Anouk
Philippa Celeste (Pippa)
Anouk Amabel
Tessa Madeleif
Rosemary Sybil (Romy)
Aaaaand my fave girls’ name attributed to the Netherlands: Annefleur - maybe Annefleur Margaret
I like: Edmund, Arthur, and Gideon best (Henry and Theodore too popular - Arthur might be too? - and I’m off Theodore - bit too cute).
Others:
Wilfred (prefer Wilfy to Alfred’s Alfie)
Rupert
Felix
Casper
Florian
Hugo
Willem
Fabian
Griffin
Ambrose
Peregrin (Pippin)
Tobias
Alasdair