| Year | Day/Month | Title |
| Edward the Elder (899 - 924) |
|
900 | |  Constantine becomes ruler of Scotland
|
| | Constantine claimed the throne of Scotland when Donald II was killed in battle. |
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| Aethelstan (924 - 939) |
|
927 | | Athelstan becomes overlord King
|
| | With the death of Sihtric, the Dane's leader in the North, Athelstan then drove out his sons. This left Athelstan the master of Northumbria. His attacks on the Welsh and the submission of Constantine the King of Scotland and Owen the King of Cumberland led to him becoming overlord. |
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|
|
934 | | Athelstan invades Scotland
|
| | Athelstan put together a large army and invaded Scotland destroying it as he advanced north. |
| |
|
|
937 | | Danish invasion
|
| | The Dane Anlaff (possibly Sihtric's son), Owen of Cumberland and Constantine, King of the Scots sailed into the Humber to invade Nothumbria. Athelstan's speed at raising his army that marched north put paid to any plans of invasion and a fierce battle occurred (Brunanburgh near Beverley ?) in which many Danish kings and earls were killed. |
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| Edmund (939 - 946) |
|
943 | | Malcolm I becomes ruler of Scotland
|
| | Constantine abdicated in 943 to retire to a monastery. Malcolm I became ruler of Scotland. |
