King Charles XIV John of Sweden (also King Charles III John of Norway), who had been born in France as Jean Bernadotte, was made ruler of the Principality of Pontecorvo by Napoleon I in 1806 and was as such styled Prince Bernadotte,[1] this before he was elected as Crown Prince of Sweden in 1810.
[7][8] Oscar's grandnephews, Sigvard, Carl Johan and Lennart (who all had been denied use of their Swedish titles after marrying below their station), were also incorporated into the Luxembourgish nobility and herewith created hereditary Counts of Wisborg in 1951.
[7] In those government documents however, which refer to Oscar's titles, they and their wives were also styled and recognized as Princes and Princesses Bernadotte,[9] with their own specific arms surmounted by the coronet for that rank.
[24][25] According to all six books of memoires by Sigvard,[26] Carl Johan[27] and Lennart Bernadotte, [28] two of their wives[29] and a more recent summary of these matters[30] Crown Prince (later King) Gustaf Adolf of Sweden from the 1930s on had played an integral and abiding part in the removal and denial of their Swedish titles and privileges.
His granddaughter Queen Margrethe II of Denmark has commented on this, saying that he probably would have treated his sons better if their royal British mother Crown Princess Margareta had lived longer.