Sweyn was born around 1020 and died in 1052 returning from a pilgrimage to Jerusalem. He was the eldest son of Earl Godwin of Wessex. He was created Earl of Herefordshire but was exiled after abducting the abbess of Leominster. He was allowed to return to England in 1049 but was exiled again after murdering his cousin.
Family tree for Sweyn of Herefordshire son of Godwin, Earl of Wessex showing: