Edmund I in the context of "Edgar the Peaceful"

Edgar (or Eadgar), c. 944 – 8 July 975, also known as Edgar the Peacemaker and the Peaceable, was King of the English from 959 until his death in 975. He became king of all England on his brother Eadwig's death. He was the younger son of King Edmund I and his first wife, Ælfgifu. A detailed account of Edgar's reign is not possible, because only a few events were recorded by chroniclers and monastic writers, who were more interested in recording the activities of the leaders of the church.

Edgar mainly followed the political policies of his predecessors, but there were major changes in the religious sphere. The English Benedictine Reform, which he strongly supported, became a dominant religious and social force. It is seen by historians as a major achievement, and it was accompanied by a literary and artistic flowering, mainly associated with Æthelwold, Bishop of Winchester. Monasteries aggressively acquired estates from lay landowners with Edgar's assistance, leading to disorder when he died and former owners sought to recover their lost property, sometimes by force. Edgar's major administrative reform was the introduction of a standardised coinage in the early 970s to replace the previous decentralised system. He also issued legislative codes which mainly concentrated on improving procedures for enforcement of the law.

Æthelstan or Athelstan (/ˈæθəlstæn/; Old English: Æðelstān [ˈæðelstɑːn]; Old Norse: Aðalsteinn; lit. 'noble stone'; c. 894 – 27 October 939) was King of the Anglo-Saxons from 924 to 927 and King of the English from 927 to his death in 939. He was the son of King Edward the Elder and his first wife, Ecgwynn. Modern historians regard him as the first King of England and one of the "greatest Anglo-Saxon kings". He never married and had no children; he was succeeded by his half-brother, Edmund I.

When Edward died in July 924, Æthelstan was accepted by the Mercians as king. His half-brother Ælfweard may have been recognised as king in Wessex, but died within three weeks of their father's death. Æthelstan encountered resistance in Wessex for several months, and was not crowned until September 925. In 927, he conquered the last remaining Viking kingdom, York, making him the first Anglo-Saxon ruler of the whole of England. In 934, he invaded Scotland and forced Constantine II to submit to him. Æthelstan's rule was resented by the Scots and Vikings, and in 937 they invaded England. Æthelstan defeated them at the Battle of Brunanburh, a victory that gave him great prestige both in the British Isles and on the Continent. After his death in 939, the Vikings seized back control of York, and it was not finally reconquered until 954.

Eadwig (also Edwy or Eadwig All-Fair, c. 940 – 1 October 959) was King of England from 23 November 955 until his death in 959. He was the elder son of Edmund I and his first wife Ælfgifu, who died in 944. Eadwig and his brother Edgar were young children when their father was killed trying to rescue his seneschal from attack by an outlawed thief on 26 May 946. As Edmund's sons were too young to rule he was succeeded by his brother Eadred, who suffered from ill health and died unmarried in his early 30s.

Eadwig became king in 955 aged about fifteen and was no more than twenty when he died in 959. He clashed at the beginning of his reign with Dunstan, the powerful Abbot of Glastonbury and future Archbishop of Canterbury, and exiled him to Flanders. He later came to be seen as an enemy of monasteries, but most historians think that this reputation is unfair. In 956, he issued more than sixty charters transferring land, a yearly total unmatched by any other European king before the twelfth century, and this is seen by some historians as either an attempt to buy support or rewarding his favourites at the expense of the powerful old guard of the previous reign.

Ælfgifu of Shaftesbury (died 944) was the first wife of King Edmund I (r. 939–946). She was Queen of the English from her marriage in around 939 until her death in 944. Ælfgifu and Edmund were the parents of two future English kings, Eadwig (r. 955–959) and Edgar (r. 959–975). Like her mother Wynflaed, Ælfgifu had a close and special if unknown connection with the royal nunnery of Shaftesbury (Dorset), founded by King Alfred, where she was buried and soon revered as a saint. According to a pre-Conquest tradition from Winchester, her feast day is 18 May.

Eadred (also Edred, c. 923 – 23 November 955) was King of the English from 26 May 946 until his death in 955. He was the younger son of Edward the Elder and his third wife Eadgifu, and a grandson of Alfred the Great. His elder brother, Edmund, was killed trying to protect his seneschal from an attack by a violent thief. Edmund's two sons, Eadwig and Edgar, were then young children, so Eadred became king. He suffered from ill health in the last years of his life and he died at the age of a little over thirty, having never married. He was succeeded successively by his nephews, Eadwig and Edgar.

Eadred's elder half-brother Æthelstan inherited the kingship of England south of the Humber in 924, and conquered the south Northumbrian Viking kingdom of York in 927. Edmund and Eadred both inherited kingship of the whole kingdom, lost it shortly afterwards when York accepted Viking kings, and recovered it by the end of their reigns. In 954, the York magnates expelled their last king, Erik Bloodaxe, and Eadred appointed Osullf, the Anglo-Saxon ruler of the north Northumbrian territory of Bamburgh, as the first ealdorman of the whole of Northumbria.

Æthelflæd of Damerham was Queen of the English as the second wife of King Edmund I from their marriage c. 944 until Edmund died in 946.

Æthelflæd was a daughter of ealdorman Ælfgar, probably the ealdorman of Essex. Her mother's name is not recorded. She had at least one brother and at least one sister, Ælfflæd (died c. 1002). Ælfflæd was married to Byrhtnoth, who probably succeeded her father as ealdorman of Essex. Byrhtnoth was killed at the Battle of Maldon in 991. Æthelflæd and Ælfflæd were Ælfgar's heirs at his death, some time between 946 and 951 based on the dating of his will, S1483.

Olaf Guthfrithson or Anlaf Guthfrithson (Old Norse: Óláfr Guðrøðsson [ˈoːˌlɑːvz̠ ˈɡuðˌrøðsˌson]; Old English: Ánláf; Old Irish: Amlaíb mac Gofraid; died 941) was a Hiberno-Scandinavian (Irish-Viking) leader who ruled Dublin and Viking Northumbria in the 10th century. He was the son of Gofraid ua Ímair and great-grandson of Ímar, making him one of the Uí Ímair. Olaf succeeded his father as King of Dublin in 934 and succeeded in establishing dominance over the Vikings of Limerick when he captured their king, Amlaíb Cenncairech, in 937. That same year he allied with Constantine II of Scotland in an attempt to reclaim the Kingdom of Northumbria which his father had ruled briefly in 927. The forces of Olaf and Constantine were defeated by the English led by Æthelstan at the Battle of Brunanburh in 937.

Olaf returned to Ireland in 938 but after Æthelstan's death the following year Olaf left for York where he was quickly able to establish himself as king, with his brother Blácaire mac Gofraid being left to rule in Dublin. Olaf and Æthelstan's successor Edmund met in 939 at Leicester where they came to an agreement regarding the division of England between them. This agreement proved short-lived, however, and within a few years Vikings had occupied the Five Boroughs of Derby, Leicester, Lincoln, Nottingham and Stamford. Olaf died in 941 and was succeeded in Northumbria by his cousin Olaf Cuaran. At the time of his death, the Irish annals title him "king of Danes" and "king of the Fair Foreigners and the Dark Foreigners".

Máel Coluim (died 997) was a tenth-century King of Strathclyde. He was a younger son of Dyfnwal ab Owain, King of Strathclyde, and thus a member of the Cumbrian dynasty that had ruled the kingdom for generations. Máel Coluim's Gaelic name could indicate that he was born during either an era of amiable relations with the Scots, or else during a period of Scottish overlordship. In 945, the Edmund I, King of the English invaded the kingdom, and appears to have granted the Scots permission to dominate the Cumbrians. The English king is further reported to have blinded several of Máel Coluim's brothers in an act that could have been an attempt to deprive Dyfnwal of an heir.

It is unknown when Dyfnwal's reign came to an end. There is reason to suspect that a certain Rhydderch ap Dyfnwal was a son of his, and that this man ruled when he assassinated the reigning King of Alba in 971. Certainly by 973, Máel Coluim was associated with the kingship, as both he and his father are recorded to have participated in a remarkable meeting of kings assembled by Edgar, King of the English. The context of this assembly is not entirely clear. It could have concerned the stability of the border between the English realm and that of the Scots and Cumbrians. It could have also focused upon lurking threat of Vikings based in Dublin and the Isles.