Mary Waldegrave, Countess Waldegrave British countess (1850–1933) Parents Laura Waldegrave Roundell Palmer, 1st Earl of Selborne Children Lady Mary Wilfreda Waldegrave Lady Laura Waldegrave William Waldegrave, 10th Earl Waldegrave Siblings William Palmer, 2nd Earl of Selborne Laura Ridding Sophia Palmer Sarah Palmer Partners William Waldegrave, 9th Earl Waldegrave