Royal Gathering of the Day: September 2

Celebrating the 200th anniversary of the Kingdom of the Netherlands this weekend, the Dutch King and Queen were joined by the King and Queen of the Belgians, the Grand Duke and Grand Duchess of Luxembourg, and the President of Germany and his partner.
What percentage of crossover is there between these three royal closets, do you think? I mean, they share a favorite designer (Natan, worn here certainly by Máxima and Mathilde, and probably by Maria Teresa too) and a favorite milliner (Fabienne Delvigne, again worn by Máx and Mathilde, though it appears MT has branched out for this occasion). Their names even share the same first letter (not relevant, but I'm just saying).
When you start thinking about it, it almost becomes impressive that they managed to rustle up three different looks for this one event. Would have been some kind of epic if they'd done the Natan triplet act properly, though...
 
Photos: Pool via Getty Images, and NOS screencap