Any absence of Beatrix would look very odd, I presume. It is very well documented that the couples met at their weddings respectively and that Beatrix and Richard used to know each other quite well. Not sure how well Maxima knows the Berleburgs, since we have never heard of any social or family gatherings here. I also think that Beatrix and Benedicte weren't the closest of friends, but Richard and Claus supposedly were excellent pals though almost 10 years apart in age, so not exactly childhood friends.
BTW, perhaps a coincidence: Richard's first names are Richard Casimir Karl August Robert Konstantin
Prince Constanijn's son is also called Casimir.
Does anybody know who Constanijn's godparents are?
His godparents are former King Constantine II of Greece, Prince Aschwin of Lippe-Biesterfeld (oncle of Beatrix), Axel Freiherr von dem Bussche-Streithorst (related to Claus), Max Kohnstamm, and Corinne de Beaufort-Sickinghe (both friends with Beatrix and Claus)
I also would say Bea and Bene weren't close but they knew each other since their early childhood. http://3.bp.blogspot.com/...U/CHyVwbA97xw/s1600/1.jpg