Yes, see the daughters-in-law of Queen Beatrix: none of them are descendants of Queen Wilhelmina but are married to Princes of the Netherlands/Princes of Orange-Nassau and all attend events which are linked "the exercize of the royal function".
--Previous Message-- : Can a male descend borrow for is wife? : PJ : : --Previous Message-- : I believe the jewels are placed as an apart : entity in the framework of the larger : Foundation Crown Properties of the House : Orange-Nassau. The goal: "Te bevorderen : dat afstammelingen van H.M. Koningin : Wilhelmina bij de uitoefening van de : Koninklijke waardigheid de beschikking : hebben over de daartoe nodige of gewenste : roerende lichamelijke zaken." ("To : promote that the descendants of H.M. Queen : Wilhelmina, in the exercise of the royal : dignity have access to therefore necessary : or desired tangible properties.") : : The King is custodian of the Foundation and : decides but the sentence "the exercise : of the royal dignity" seems to limit : the core use of jewels to the Queen, the : King's three daughters, the Princesses : Beatrix and Margriet and finally the Duchess : of Parma and the Princesses de Bourbon de : Parme (who are descendants of Queen : Wilhelmina and so now and then exercising : the royal function). : : : : : :