Only legitimate son of Charles XIII of Sweden, he was born in 1798 and died six days later, his death meant his father had no legitimate issue, and thus was forced to adopt two sons, the second of whom started the House of Bernadotte in Sweden. However, what if Carl Adolf survives, and lives passed his father and becomes King in 1818 aged 20. Would he exercise as much authority as Carl John did otl, as Crown Prince? Would he be forced into a constitutional role? Who might he marry?