Indeed. Queen Wilhelmina overcame her dislike for the Belgian royals because of her idea that the Von Sachsen-Coburgs are intruders. When she met King Leopold III she was charmed by his politesse, his respect towards her, his introvert personality.
In 2015 the National Archives opened correspondence between Queen Wilhelmina and King Leopold. It was "
Cher cousin" and
Chère cousine" between the two. The King constantly wrote
Appeldoorn on the letters (Apeldoorn is the place where Het Loo Palace is located).
In between faits-divers about family, friends, Princess Beatrix (godchild of the King), also the danger of a new World War was food for discussion. Queen Wilhelmina urged Prime Minister Hendrik Colijn to talk with King Leopold about a joint initiative against the threathening danger.
King Leopold III surprised his Prime Minister Hubert Pierlot with announcing a joint initiative by the Benelux, the Scandinavian countries, Switzerland and Portugal. Prime Minister Colijn wrote to Queen Wilhelmina: "It seems the King has made concrete efforts in this matter, however in another direction than I did expect."
Queen Wilhelmina was won for King Leopold's idea of a summit of the eight countries, but Prime Minister Colijn remained sceptical: "The whole political and journalistic world, from Alaska to Cape Hoorn, from Spitsbergen to Cape the Good Hope would quack like ducks when suddenly Prime Ministers from eight smaller countries whould raise their voice."
In her correspondence to "Cher cousin" the Queen showed her disappointment with the lukewarm reception of their efforts. On August 23rd 1939 the King did an appeal to the leaders, on behalf of the Benelux and the Scandinavian states.
A day later the Germans and the Soviets agreed the Molotov-Von Ribbentrop Pact. One week later the world war started.
https://nos.nl/artikel/2012374-wilhelmina-moedigde-lieve-neef-leopold-aan.html