Insidering notes by Marengo considering Juliana's marriage posted in The Royals Articles:
"First Rumours
As early as 1926 the first rumours about a marriage for Princess Juliana of The Netherlands appeared in the press all over Europe. Polish newspapers said that Lord Rupert Cambridge, Viscount Trematon, son of Princess Alice, Countess of Athlone, would be the lucky man. Princess Alice was the daughter of Prince Leopold (Queen Victoria's haemophiliac youngest son) and Princess Helen of Waldeck-Pyrmont, a sister of Queen Emma, and thus was a first cousin to Queen Wilhelmina, so Juliana and Rupert were second cousins. Sadly, Rupert, a haemophiliac like his grandfather, died in 1930 after being injured in a car crash. Swedish newspapers then placed their bets on the German Prince Ernst of Erbach-Schönberg, son of another of Queen Emma's sisters, Elisabeth. The Minister of Foreign Affairs, Jhr. Beelaerts van Blokland, wanted to suppress the rumours. He invited the foreign correspondents in The Netherlands to his office and told them there was no truth to the story; the rumours duly stopped.Frans Beelaerts
Juliana herself was studying in Leiden and living with a group of friends in Katwijk; she was enjoying her freedom and was not thinking about marriage. Her mother and grandmother, however, did start to think about it. The same Minister of Foreign Affairs, Jhr. Frans Beelaerts van Blokland (pictured on the right), was requested to start looking around. The Minister was an enthusiastic genealogist and turned the Almanach de Gotha inside out. He would become the spider in the web during this search. All Dutch envoys would report to him about a Prince X or Prince Y; every diplomat had his own favourite and tried to promote him with Beelaerts. Even when Beelaerts resigned from his ministerial post and became vice-president of the Council of State, Wilhelmina requested that he continue his search. She did not want to get the new Minister involved as she considered this a private affair, and she once even said that Juliana's marriage should be a love match.
Conditions
Still, there were certain conditions that would be applicable even for a love match. First of all, the candidate had to be a Protestant. Wilhelmina was very strict about this; her dynasty had always been a Protestant one, and she thought it "out of the question" for Juliana to marry a Catholic. Her strictness even went so far that she did not allow Prince Charles of Belgium to be around when she and Juliana paid a state visit to Belgium. Rumours about a Catholic marriage had to be avoided. The second condition was that the prospective husband had to be a member of one of the royal families of Europe. Initially Wilhelmina would not consider princes of the mediatized houses but only those from the 50 royal families that ruled Europe after the Napoleonic wars. This was a standard that the Erbachs did not meet. It also ruled out members of the Dutch aristocracy as that would be an unequal marriage.
Queen Emma, Princess Juliana, Prince Hendrik, Queen Wilhelmina The future son-in-law of Wilhelmina should also be in good health, and his family must have consistently exhibited impeccable behaviour. Many candidates realated to the British royal family were thus excluded due to fear of hemophilia. Juliana's family were more relaxed about the financial situation of her future husband; he didn't have to be rich, although it would be preferred because it would take away the impression that he had married Juliana for financial advantages. The prince would get a salary of 200,000 guilders, and he would be allowed to make himself useful in the Army. Although Juliana was still shy and clumsy, her university years had made her less insecure and more appreciative of qualities other than high birth and good looks: she made it known that she preferred her prospective husband to be an intelligent man.
Early Swedish Candidates
A German candidate was not the first choice, especially after Hitler came to power in 1933 and the Dutch population was becoming anti-German. Many German royal families were financially ruined or discredited in another way. So Wilhelmina had a preference for a Swedish Prince for a number of reasons. The Swedish Bernadottes were related to the Dutch Nassaus. Although the dynasty wasn't that impressively old, there were several young, good-looking princes. Beelaerts sent his first instructions to the Dutch envoy in Stockholm, Baron Dolf Sweerts de Landas Wyborgh, in April 1929: The Princess would be 21 by the end of the month, and the time had come to start looking for a suitable husband. Would the envoy be able to make some discreet enquiries at the Swedish court? Maybe the Princes could visit The Hague when they were travelling to Brussels, where the Swedish Princess Astrid was Crown Princess. And where did the princes spend their winter holidays? Switzerland would be a perfect place for a discreet meeting. Queen Wilhelmina refused to go to Sweden herself; she did not like the Swedish public, "too intrusive." The answers weren't encouraging. The princes would travel to Brussels via London, where they had relatives too, and the winter holidays were spent in Sweden.
Prince Carl Initially Sweerts made enquiries about four princes. Prince Lennart was quickly skipped over as he seemed to be in bad health and suffered from bronchitis. So three princes were left: Sigvard and Bertil, sons of the Crown Prince, and Prince Carl (pictured on the right), a nephew of the King and the brother of the Crown Princesses of Norway and Belgium. Sigvard, however, seemed to have an unpleasant character and had artistic ambitions, so he could be deleted from the list too. Once Bertil was called a "real guy, navy officer who likes sport but who dislikes books." A disadvantage was that he had had a traffic accident 2 years previously where somebody died and the prince did not have a driver's licence. Wihelmina did not send Bertil an invitation to pay a visit when he was in The Netherlands for his Navy service. And Prince Carl was a charming boy, but unfortunately was only interested in cars.
In England the Dutch Envoy, Jhr. Reneke de Marees van Swinderen, made enquiries about Prince George of Russia, son of Grand Duke Constantine. His employers were not exactly positive about the prince, so he didn't seem suitable to be the next Dutch Prince Consort either. The Countess of Athlone called her nephew Lord Frederick Cambridge (younger son of the Countess's brother-in-law, the Marquess of Cambridge, a brother of Queen Mary) "awfully shy and stupid" in a letter to Wilhelmina, immediately ruling him out as well.