Round 1 (UK):
http://www.behindthename.com/bb/game/5145673Round 2 (Denmark):
http://www.behindthename.com/bb/game/5145873
The Netherlands
1: The Antique Pearl Tiara

2: The Dutch Laurel Wreath Tiara

3: The Mellerio Ruby Parure Tiara

4: Queen Emma's Diamond Tiara

5: The Stuart Tiara

6: The Wurttemberg Ornate Pearl Tiara

7: The Dutch Sapphire Parure Tiara

8: The Ruby Peacock Tiara

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Themed meanings are fine for the FNs.
1) DD: Floral-themed FN / Adelheid Cornelia Esmee Hermina Isabeau Josefien Leonie Marjolein Quirine Theresia
Optional second MN starts with J.
2) DS: Color-themed FN / Adriaan Constant Fabian Hendrik Ignaas Joris Lennard Melchior Rafael Steffen
Optional second MN starts with D.
3) DD: Gemstone-themed FN / Diantha Elvira Gerlinde Ingrid Lisanne Nathalie Renate Saskia Thirza Vera
Optional second MN starts with R.
4) DS: Metal- or stone-themed FN / Allard Bartholomeus Ewald Gillis Hugo Jochem Maurits Roeland Timon Wendel
Optional second MN starts with F.
5) DD: Virtue-themed FN / Annemarie Beatrix Evelien Gertrude Hadewych Jolanda Margriet Sonja Tatiana Zoe
Optional second MN starts with N.
6) DS: Element-themed FN / Clemens Ferdinand Hieronymus Kasper Marten Nikolaas Robin Sieger Wolter Yvo
Optional second MN starts with T.
7) DD: Celestial-themed FN / Catharina Daphne Felicia Karlijn Liselotte Mathilde Petra Sabien Tamara Willemina
Optional second MN starts with C.
8) DS: Animal-themed FN / Bernhard Diederick Godfried Jurgen Lars Michiel Pascal Peter Rutger Tijmen
Optional second MN starts with A.