List of Scottish monarchs
The Kingdom of the Picts just became known as Kingdom of Alba in Gaelic, which later became known in Scots and English as "Scotland"; the terms are retained in both languages to this day. By the late 11th century at the very latest, Scottish kings were using the term "rex Scottorum", or King of Scots, to refer to themselves in Latin. The Kingdom of Scotland was merged with the Kingdom of England to form a single Kingdom of Great Britain in 1707. Thus Queen Anne became the last monarch of the ancient kingdoms of Scotland and England and the first of Great Britain, although the kingdoms had shared a monarch since 1603 (see Union of the Crowns). Her uncle Charles II was the last monarch to be crowned in Scotland, at Scone in 1651. He had a second coronation in England ten years later.
Owain Foel
Owain Foel could have lived into the 1050s. In 1054, Siward, Earl of Northumbria invaded Alba and defeated the reigning Mac Bethad. According to the twelfth-century texts "Gesta regum Anglorum", and "Chronicon ex chronicis", Siward set up a certain Máel Coluim—identified as the son of the king of the Cumbrians—in opposition to Mac Bethad. Máel Coluim appears to have been a member of the Cumbrian royal dynasty, and may well have been a descendant of Owain Foel himself: perhaps a son or grandson. The Gaelic personal name borne by this man could be evidence of an ancestral link with the ruling Scottish Alpínid dynasty: perhaps a matrilineal link to Owain Foel's confederate at Carham, Máel Coluim mac Cináeda. If the Máel Coluim of 1054 was indeed a member of Owain Foel's family, one possibility is that the Scots had deprived him of the Cumbrian kingship following Owain Foel's demise, and that Siward installed him as king over the Cumbrians following the English victory against Mac Bethad. Another possibility, suggested by the account of events dictated by "Chronicon ex chronicis", is that Siward installed Máel Coluim as King of Alba. If Máel Coluim was indeed placed upon the Scottish throne, one possibility is that Owain Foel was still reigning as King of Strathclyde. Whatever the case, Owain Foel is the last known king of the realm.