Ana Patricia Botin, named chairman of Banco Santander SA, becomes the most powerful woman in European banking, succeeding her father a day after his death. Santander’s board today named Botin, 53, to the top executive post at Europe’s second-biggest bank by market value in a unanimous vote. Botin, who is giving up her post as chief executive officer of Santander’s U.K. business, replaces her father Emilio who died of a heart attack at the age of 79.