Everyone knows that should 85-year-old Queen Elizabeth II die, her son Charles, if living, would succeed her. Second in line is Charles’s son Prince William, whose wedding to Kate Middleton Friday will be a global media event. William’s little brother, Prince Harry, is No. 3.
Ms. Vogel, 38, holds a different distinction: By the account of some genealogists, she is the last person in line to the throne.
Ms. Vogel stands behind the many who, like her, are descendants of Sophia of Hanover, a relatively obscure German princess selected by the English Parliament in 1701 to inherit the crown. Sophia’s genes have dictated the succession ever since.