Around 990 [his daughter] Aelfgifu Northumbria was born to Aelfhelm Northumbria and Wulfruna.
Around 994 Aelfhelm Northumbria was appointed Earldorman Northumbria.
In 1006 Earldorman Eadric "Streona aka Acquisitive" Mercia instigated the killing of Aelfhelm Northumbria on behalf of King Æthelred "Unready" II of England (age 40).
In 1006 Aelfhelm Northumbria was murdered by Earldorman Eadric "Streona aka Acquisitive" Mercia.
John of Worcester. 1035. Canute (age 40), king of England, before his death, gave the kingdom of Norway to Sweyn (age 19), who was reported to be his son by Elfgiva of Northampton (age 45) [Note. Possibly a mistake for Northumberland?], the daughter of Alfhelm the ealdorman, and the noble lady Wulfruna. Some, however, asserted that this Elfgiva desired to have a son by the king (age 40), but as she could not, she caused the new-born child of a certain priest to be brought to her, and made the king (age 40) fully believe that she had just borne him a son. He also gave the kingdom of Denmark to Hardicanute (age 17), his son by the queen Elfgiva (age 50). Afterwards, the same year, he departed this life at Shaftesbury on Wednesday, the second of the ides [the 12th] of November; but he was buried at Winchester in the Old Minster, with due honours. After his burial the queen Elfgiva (age 50) took up her abode there. Harold (age 19) also said that he was the son of king Canute (age 40) and Elfgiva of Northampton (age 50), although that is far from certain; for some say that he was the son of a cobbler, and that Elfgiva (age 50) had acted with regard to him as she had done in the case of Sweyn: for our part, as there are doubts on the subject, we cannot settle with any certainty the parentage of either. Harold (age 19), however, assuming the royal dignity, sent his guards in the utmost haste to Winchester, and tyrannically seized the largest and best part of the treasure and wealth which king Canute (age 40) had bequeathed to queen Elfgiva (age 50), and having thus robbed her, permitted her to continue her residence at Winchester. He then, with the consent of many of the higher orders of England, began to reign as though he was the lawful heir; but he had not the same power as Canute (age 40), because the arrival of Hardicanute (age 17), the more rightful heir, was looked for. Hence, shortly afterwards, the kingdom was divided by lot, Harold (age 19) getting the northern, and Hardicanute (age 17) the southern portion.