In England, Earl Godwin died in 1053 and his sons were increasing in power: Harold succeeded to his father's earldom, and another son, Tostig, became Earl of Northumbria. Other sons were granted earldoms later: Gyrth as Earl of East Anglia in 1057 and Leofwine as Earl of Kent some time between 1055 and 1057. Some sources claim that Harold took part in William's Breton campaign of 1064 and swore to uphold William's claim to the English throne at the end of the campaign, but no English source reports this trip, and it is unclear if it actually occurred. It may have been Norman propaganda designed to discredit Harold, who had emerged as the main contender to succeed King Edward. Meanwhile, another contender for the throne had emerged – Edward the Exile, son of Edmund Ironside and a grandson of Æthelred II, returned to England in 1057, and although he died shortly after his return, he brought with him his family, which included two daughters, Margaret and Christina, and a son, Edgar the Ætheling.