Who was the legal grandson of the Earl of Merica?
Ælfgar, Earl of Mercia Ælfgar (died c. 1060) was the son of Leofric, Earl of Mercia, by his famous mother Godgifu (Lady Godiva). He succeeded to his father's title and responsibilities on the latter's death in 1057. He gained the additional title of Earl of East Anglia, but also was exiled for a time. Through the first marriage of his daughter he would become father-in-law of the Welsh king Gruffydd ap Llywelyn; a few years after his death, his daughter would become a widow and marry English King Harold.
Henry Percy, 11th Duke of Northumberland Henry Alan Walter Richard Percy, 11th Duke of Northumberland FRS (1 July 1953 – 31 October 1995), styled Earl Percy until 1988, was a British peer. He was the eldest son of Hugh Percy, 10th Duke of Northumberland and a godchild of Queen Elizabeth II.