Rebafan, the people in the above pictures represent either Queen Beatrix three sons and spouses or her youngest sister, Princess Margriet, her husband, Dr. Pieter Von Vollenhoven and their four sons and three of their daughter-in-laws.
Queen Beatrix is a widow. Her three sons are Crown Prince Willem-Alexander and his wife, Crown Princess Maxima; Friso and his wife Mabel and Prince Constantijn and his wife Princess Laurentien. In above post 167, on the second line, you see CP W-A and his wife CPMaxima in the first photo -- she in the rather decorative brown hat and black coat. Also on the second line is a photo of Prince Constantijn and his wife Princess Laurentien -- she is pregnant and in the pink top and Pucci material dress. And in the first photo of the same post, the second woman from the left who is pregnant and in a beige raincoat is Mabel and next to her is her husband Friso. Those are the people in Beatrix immediate family except for mentioning the grandchildren.
Princess Margriet and Doctor Peter V-V have four sons: Maurits and his wife Marilene; Bernhard and his wife Annette; Pieter and his wife Anita (who was not at this event) and Floris and his wife Aimee. In the first post of 167, you can see (from left to right) Annette in the green, then Mabel and Friso, and then Marilene, Maurits, Pieter and Floris In post l67 on the first line, third picture you see Floris and Aimee (in the hot pink).
Now that you know the couples you can check under "sitemap": old, new, royal and blue and find each of the couples wedding threads which will help you get to know them some and then reading under the Dutch Royal Family you can find a wealth of information on these families. They are a very vibrant and fun royal family to watch! Good Luck!