网页Willem-Alexander (Dutch: [ˈʋɪləm aːlɛkˈsɑndər]; Willem-Alexander Claus George Ferdinand; born 27 April 1967) is King of the Netherlands.. Willem-Alexander was born in Utrecht during the reign of his maternal grandmother, Queen Juliana, as the eldest child of Princess Beatrix and Prince Claus.He became Prince of Orange as heir apparent upon his mother's accession on 30 April 1980.