Prince Jean of Luxembourg, who is the younger brother of Grand Duke Henri, was married yesterday in Roermund, the Netherlands, to Diane de Guerre. The couple were married in a civil ceremony. Prince Jean renounced his right of succession to the Luxembourg throne in September 1986 shortly after the birth of his first child, Marie-Gabrielle. The following May, he married Marie-Gabrielle's mother, French lawyer, Helene Vestsur. The couple went on to have three more children, Constantin, Wencelas and Carl-Johan before getting divorced. In 2004, Prince Jean's children were raised from the the rank of Count or Countess of Nassau to HRH and the title Prince or Princess of Nassau, but without dynastic rights.
Diane de Guerre, who was born in 1962, is the daughter of Claude Gaston de Guerre(1910-1997)and second wife, Countess Eugenie Wolff-Metternich (1923). Diane has one brother, Thibaud, and a sister, Valerie.
Here is a link to Roermond's official site with information (in Dutch) about the wedding - and two photographs from the civil ceremony.