Louis Philippe arranged for the marriage of his youngest son , Antoine , Duke of Montpensier , to Infanta Luisa Fernanda of Spain , younger sister of Isabella II of Spain .
( Further proof of the existence of the Royal Marriagespeople.marriagein Canadian law is , according to Toffoli , provided by the approval by the Queen in her Canadian Council in 1981 to the marriage of Charles , Prince of Wales , and Lady Diana Spencer separately to the same approval given by the Queen in her British Council . )